JP2005290697A - Reinforcement binder and mounting fixture therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement binder which can firmly and stably bind an intersection of reinforcements from the outside in a limited gap between the reinforcements by locking a resilient force of a single resilient steel member by a locking portion, and to provide a mounting jig therefor. <P>SOLUTION: According to the structure of the reinforcement binder, curved portions having a semi-arcuate tip are expanded downward and extended to two arm portions 3, 4 via reinforcement holding portions 2, respectively. The reinforcement holding portions 2 hold a main reinforcement at two axial locations, and therefore a surface of the main reinforcement 12 is pressed and brought into contact with a rear surface of a hoop 11. The two arm portions 3, 4 are extended from the reinforcement holding portions 2 toward respective front ends. One of the arm portions forms a connected arm portion 3 which extends in a slightly upper inner direction to reach one lower end of a hook portion 5, and the other arm portion 4 forms a hooking arm portion 4 which extends from the reinforcement holding portion 2 almost at right angles toward the front end. The hooking arm portion 4 has a length that can resiliently engage with a bent engaging portion 6 bent upward from the other lower end of the hook portion 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a reinforcing bar binding device that binds crossing portions of reinforcing bars that intersect substantially at right angles, such as basic reinforcing bars (main reinforcing bars and hoops), and more specifically, includes a bending portion, a hooking portion, two arms, and a bending locking portion. The present invention relates to a reinforcing bar binding tool made of a single elastic steel material and a mounting jig therefor.

Reinforcing bars are used for the frame of a wall of a building, foundation work, etc., and usually have a structure in which vertical and horizontal bars intersect. A wall surface or the like is completed by pouring concrete after the foundation structure is formed by the horizontal and vertical bars.
For example, foundation work is carried out by excavating a vertical hole with an excavator, removing earth and sand, incorporating rebar, and pouring concrete. The steel bar used at this time may be brought to the construction site after being assembled in advance at the factory. However, there was a problem in terms of transportation efficiency because the reinforcing bars assembled in the factory in advance were transported to the construction site by vehicles.

On the other hand, there is a case where a reinforcing bar is assembled at a construction site. For example, a method is known in which the intersections of the basic reinforcing bars are bound by welding. However, there is a problem that welding is difficult because the reinforcing bars are coated with a rust inhibitor or the like. Welding also depended on the weather and had to rely on the manual work of a well-skilled welder.
On the other hand, a method of winding and fixing the binding wire around the crossing portion of the reinforcing bar for the foundation is also known. However, this method involves tying the binding wires one by one to the intersection, and then tying them up by twisting the work tools and fixing them. It has been pointed out that the rebar rod assembly efficiency is poor and the binding strength tends to vary, resulting in poor stability.

From this point of view, various binding tools have also been developed for simply binding the intersections of the basic reinforcing bars (see, for example, Patent Documents 1 and 2).
However, the reinforcing bar stopper described in Patent Document 1 has a low binding strength because the reinforcing bar is fixed only by elastic force, and a strong pressing is applied to the metal fitting at the time of binding, so that the metal fitting is attached to the basic reinforcing bar. I had to push it into the intersection. Furthermore, the cross section binding tool described in Patent Document 2 is also bound only by elastic force.
JP-A-11-241459 JP 2000-38806

The present invention has been made in order to eliminate the drawbacks of the prior art, and the object of the present invention is to limit the rebar between the reinforcing bars by using the elastic force of one elastic material. In the formed gap, the crossing portion of the reinforcing bars is firmly and stably bound from the outside.
Another object is to bind the reinforcing bar binding device according to the present invention simply and quickly by using a dedicated mounting jig.

  In order to solve the above problems, the present invention employs the following configuration.

  (1) In a reinforcing bar binding tool made of a single elastic steel material that binds crossing portions of reinforcing bars that intersect at right angles, the rear end has a radius R that is larger than the diameter of one reinforcing bar that is outside the crossing portion. A curved part that expands downward, a hook part hooked to the reinforcing bar at the front end, and a lower part of the curved part as a reinforcing bar holding part having a curvature substantially equal to the diameter of the reinforcing bar inside the intersecting part, Two arm portions extend from the reinforcing bar holding portion toward the front end, one arm portion is a connecting arm portion connected to the hook portion slightly upward, and the other arm portion is the other of the curved portions. The hook arm has a length that extends from the lower end toward the front end at a substantially right angle and can be engaged with a bent locking portion that bends upward from the other lower end of the hook portion. Two arms with the tip bent outwards and bent downwards, and engaged with the reinforcing bar holding part expanded from the curved part It is rebar tying member, characterized in that by the repulsive force may bind the intersection of reinforcing bars from the outside.

By forming the apex of the curved portion to be larger than the diameter of one reinforcing bar outside the intersecting portion, it is possible to deal with binding of reinforcing bars of any size and shape. For example, the hoop muscles are wound around the outside of the main muscles arranged in a cylindrical shape, but the hoop muscles may overlap each other depending on the length of the hoop muscles. In such a case, the two hoop muscles and the main muscles must be tied together, but by forming the top of the curved portion large so that it can be hooked on the two hoop muscles, multiple hoop muscles and main muscles can be formed. Can be united at the same time.
In addition, the bending part is expanded downward by strengthening the effect of simplifying the attachment of the reinforcing bar binding tool and the length between the expanding reinforcing bar holding parts larger than the length of the front end during binding. This is to generate a resilience.

  In addition, the top of the curved part is passed over the outer peripheral surface of the outer reinforcing bar, and the reinforcing bar holding part of the curved part at the rear end holds the inner reinforcing bar at two locations in the axial direction. The rebar surfaces come into contact with each other while pressing each other. In addition, the hooking part of the front end is hooked on the outer peripheral surface of the outer reinforcing bar, and the repelling force of the steel material works by elastically repelling the hooking arm part to the bending engagement part at the front end. They are hooked in a repressed state.

Further, the hooking arm portion is elastically repelled and engaged with the bending locking portion formed at the tip of the hooking portion, so that the binding portion is not loosened or unraveled.
In addition, the reinforcing bar holding part that connects the curved part and the two arm parts has a curvature that is approximately the same as the diameter of the reinforcing bar inside the intersection, so that the back side of the inner reinforcing bar can be held tightly. It is possible to bind the reinforcing bar intersections more stably.

(2) The length of the opening between the bending locking portion and the hooking arm portion is formed substantially equal to or greater than the hoop muscle diameter when not bound. It is a reinforcing bar tie.
In order to bind the crossing part of the reinforcing bar with the reinforcing bar binding tool, it is necessary to hook the reinforcing bar binding tool from the outside of the hoop bar. In that case, if the length of the opening part between a bending | flexion latching | locking part and a hook arm part is more than or equal to a hoop muscle, it will become easy to hook.
(3) In the above (1) or (2), the maximum length from the front end to the rear end of the reinforcing bar binding tool in the binding state is a dimension (90 mm at the minimum) that does not contact the adjacent reinforcing bars. It is the reinforcing bar binding tool described in any one.
In the currently produced steel bar, the distance between the main bars is not less than 90 mm. Moreover, since the reinforcing bar binding tool according to the present invention is bound by a strong resilience, the length from the front end to the rear end can be shortened.
(4) The reinforcing bar binding tool according to any one of the above (1) to (4), wherein both ends of the reinforcing bar holding part are three times or more the diameter of the hoop.

(5) The reinforcing bar binding according to any one of (1) to (4), including a support portion that engages with the bending locking portion, a bending portion on which the hooking arm portion is held, and a lever that follows the bending portion. It is an attachment jig for binding tools.
With such a configuration, the support arm engaged with the bending locking portion is used as a lever fulcrum, and by applying force to the lever, the hooking arm portion can be elastically repelled and quickly engaged with the bending locking portion. .

By multiplying the repellency of one elastic steel material by the engaging portion, the crossing portion of the reinforcing bars intersecting at right angles can be firmly and stably bound.
Moreover, there is an effect that the reinforcing bar binding device according to the present invention can be easily and quickly bound by using a dedicated mounting jig.

  FIG. 1 shows an example of an embodiment according to the reinforcing bar binding device of the present invention. As shown in FIG. 1, a curved portion 1 having a semicircular arc top is formed at the rear end of the reinforcing bar binding tool 10. The curved portion 1 is hooked on the outer peripheral surface of the hoop muscle 11. The curved portion is expanded downward, and is connected to the two arm portions 3 and 4 through the reinforcing bar holding portion 2. When the reinforcing bar holding part 2 holds the main bar 12 at two positions in the axial direction, the surface of the main bar 12 comes into press contact with the back surface of the hoop bar 11. Two arm portions 3 and 4 extend from the reinforcing bar holding portion 2 toward the front end. One arm portion is a connecting arm portion 3 continuously connected to one lower end of the hook portion 5 toward the upper inner side, and the other arm portion 4 is a hook extending from the reinforcing bar holding portion 2 toward the front end at a substantially right angle. This is the arm 4. The hooking arm portion 4 has a length that can be elastically repelled and engaged with a bending locking portion 6 that bends upward from the other lower end of the hooking portion 5. The tip of the hook arm 4 is formed as a bent protrusion 7 that bends outward and bends further downward.

  Next, an example of an embodiment according to the mounting jig of the present invention is shown. FIG. 2 is a view showing an example of a mounting jig according to the present invention. FIG. 2A is a plan view, and FIG. 2B is a front view. As shown in FIG. 2, the mounting jig 17 includes a support portion 14 that engages with the bending engagement portion 6 of the reinforcing bar binding device 10, a bending portion 15 on which the hooking arm portion 4 is held, and a lever 16. Consists of. A procedure for elastically engaging the hooking arm portion 4 with the bending locking portion 6 using the mounting jig 17 will be described later.

  Examples according to the present invention are shown below. In addition, the dimension, shape, etc. which are shown below are examples, and are not restrained by this. FIG. 3 is a view showing an example of the reinforcing bar binding tool 20 according to the present invention. 3A is a front view of the reinforcing bar binding tool 20, FIG. 3B is a plan view, FIG. 3C is a left side view particularly showing the connecting arm portion 23, and FIG. FIG. 6 is a right side view showing a work arm 24. Note that a hard steel wire (SWC) was used as a material for the reinforcing bar binding tool 20. In addition, as such a material, what produces elastic repellency may be sufficient, for example, a piano wire (SWP) etc. may be sufficient.

  As shown in FIG. 3A, the curved portion 21 at the rear end that is hooked on a hoop not shown has a substantially arc-shaped radius of curvature R18. However, the curvature changes depending on the size of the reinforcing bar for the foundation and is not limited to that of the first embodiment. The curved portion 21 is expanded downward (L1 = 60 mm). At the front end of the reinforcing bar binding tool 20, there is a hooking portion 25 that is hooked to the hoop. The hook portion 25 is formed in a substantially semicircular arc shape having a radius of curvature R11.5. A bending locking portion 26 having a radius of curvature R3 is formed at the tip of the hooking portion 25. As shown in the drawing, the distal end of the bending locking portion 26 slightly protrudes upward (L2 = 5 mm). A bent protrusion 27 is formed at the front end of the other hook arm 24. The bent protruding portion 27 extends obliquely outward from the hooking arm portion 24 (L3 = 8.66 mm), and further bends and extends downward at a right angle (L4 = 20 mm). The vertical difference between the bent protruding portion 27 and the bent engaging portion 26 is L5 = 37.06, and when the bent protruding portion 27 is engaged with the bent engaging portion 26, the elastic difference of the elastic steel material is used for the foundation. It is possible to bind tightly the intersection of reinforcing bars.

As shown in FIG. 3 (b), the hooking arm portion 24 has a length that can be elastically repelled and engaged with the bending locking portion 26 (L6 = 99.44 mm). The maximum value of L6 is determined by the diameter of the reinforcing bar rod and the number of main bars. In particular, since the length of the front end when bound is short compared to the length between the reinforcing bar holding portions that expand (L1), an elastic force is generated on the reinforcing bar holding portion during binding.
Further, as is clear from FIG. 3B, the bent protrusion 27 extends forward and outward by about 30 degrees from the hook arm 24.
FIG. 3C is a left side view showing the connecting arm portion 23 and the like. In FIG. 3C, the hook arm 24 side is omitted for convenience of explanation. As shown in the drawing, the lower end of the bending portion 21 is a reinforcing bar (main reinforcing bar) holding portion 22, and has a connecting arm portion 23 that is continuous with the lower end of the hook portion 25 toward the upper side. The radius of curvature of the reinforcing bar holding part 22 is R18, and the parallel length of the connecting arm part 23 in the stationary state before binding is L7 = 83.64 mm.

  FIG. 3D is a right side view showing the hook arm 24 and the like. The connecting arm 23 side is omitted. As shown in the drawing, the lower end of the bending portion 21 is a reinforcing bar holding portion 22, which is connected to a hooking arm portion 24 extending forward at a substantially right angle. The front end of the hooking arm portion 24 bends outward and bends further downward to form a bent protrusion 27.

FIG. 4 is a view showing a state in which the reinforcing bar binding tool of FIG. 3 is hooked at a crossing portion of the basic reinforcing bars intersecting at right angles. Fig.4 (a) is a front view of this reinforcing bar binding tool 20 hooked on the reinforcing bar for foundations, and (b) is a plan view thereof. Here, the basic reinforcing bars are the main reinforcing bars 32 (d ₁ = 32 mm) and the hoop bars 31 (d ₂ = 19 mm).
As shown in FIGS. 4A and 4B, the bending portion 21 is hooked on the rear side of the hoop muscle 31, and the hook portion 25 is hooked on the front side of the hoop muscle 31. The reinforcing bar holding unit 22 holds the main bar 32 at two positions in the axial direction, so that the surface of the main bar 32 is in press contact with the back surface of the hoop bar 31.

FIG. 5 is a view showing a means for binding the reinforcing bar binding tool 20 hooked at the intersection of the basic reinforcing bars in FIG.
As shown in FIGS. 5A and 5B, the support portion 34 of the attachment jig 37 is engaged with the bending locking portion 26 of the reinforcing bar binding tool. Further, the connecting portion of the hooking arm portion 24 formed at the tip of the hooking arm portion 24 and the bending protrusion portion 27 is placed on the bending portion 35 of the mounting jig 37. In such a state, the lever 34 is used as a fulcrum, the bending part 35 is used as an action point, and the lever movement with the lever 36 as a power point is possible. That is, if the lever 36 is moved in the direction of the arrow as shown in FIG. 5B, the bending protrusion 27 can be engaged with the bending locking portion 26 against the spring force of the reinforcing bar binding tool, and the main bar 32 and the hoop can be engaged. The muscle 31 is bound in a repressed state.

FIG. 6 is a front view (a) and a plan view (b) showing a state in which the main muscle 32 and the hoop muscle 31 are bound. In the bound state, the elastic force due to the spring force in the reinforcing bar holding portion 22 works outward. In addition, the elastic force acts upward in the connecting arm portion 23 and downward in the hooking arm portion 24. Accordingly, the bend locking portion 26 and the bend protrusion 27 are firmly engaged and the repulsive force of the reinforcing bar holding portion 22 is held, whereby the main bar 32 and the hoop bar 31 are locked in a tightly bound state. .
As shown in FIG. 6B, the reinforcing bar binding tool 20 according to the present embodiment can bind the reinforcing bars even if the lengths of the connecting arm portion 23 and the hooking arm 24 are minimized. For example, even when the length between adjacent main bars 32 is short, the reinforcing bars can be bound. The long length at the time of binding of the reinforcing bar binding tool 20 according to the present embodiment is L8 = 95 mm, and the adjacent main reinforcing bar 32 ′ and the reinforcing bar binding tool 20 ′ are not touched.

  FIG. 7 is a plan view showing another embodiment showing a state in which two hoop muscles and one main muscle are bound. As shown in the figure, there are cases where the surplus portion 42 of the hoop muscle 51 and other adjacent hoop muscles 52 are bound together. In such a case, the plurality of hoop muscles 51 and 52 and the main muscle 32 are bound at the same time by forming the top portion of the bending portion 41 of the reinforcing bar binding device 40 so as to be hooked on the two hoop muscles. be able to. In such a case, the hooking portion 45 may be hooked only on one hoop line 51.

  INDUSTRIAL APPLICABILITY The present invention can be used as a construction tool for bundling intersections of basic reinforcing bars (main reinforcing bars, hoop reinforcing bars, etc.) that intersect at substantially right angles, which are used for wall structures, pier frames, foundation works, and the like.

It is the perspective view which showed an example of embodiment which concerns on the reinforcing bar binding tool of this invention. It is the top view (a) and front view (b) which showed an example of embodiment which concerns on the attachment jig | tool of this invention. It is the front view (a) which showed an example of the reinforcing bar binding tool concerning Example 1, the top view (b), the left side view (c), and the right side view (d). It is the front view (a) and the top view (b) which showed the state which hooked the reinforcing bar binding tool which concerns on Example 1 on the cross | intersection part of the reinforcing bar for foundations. It is the top view (a) and front view (b) which showed the means to bind the reinforcing bar binding tool based on an Example using an attachment jig. It is the front view (a) and the top view (b) which showed the state with which the main reinforcement and the hoop reinforcement were bound by the reinforcing bar binding tool concerning Example 1. FIG. It is the top view which showed the binding state of the reinforcing bar binding tool which concerns on Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,21 Curved part 2 Holding part 3,23 Connection arm part 4,24 Hook arm part 5,25,45 Hook part 6,26 Bending latch part 7,27 Bending protrusion part 10,20 Reinforcing bar binding tool 11,31 , 51, 52 Hoop muscle 12, 32 Main muscle 14, 34 Support portion 15, 35 Bending portion 16, 36 Lever 17, 37 Mounting jig

Claims (5)

  In a reinforcing bar binding tool made of a single elastic steel material that binds the intersections of reinforcing bars that intersect at right angles, the rear end expands downward with an R larger than the diameter of one reinforcing bar outside the intersection. The curved part to be opened, the front end has a hook part that is hooked by the reinforcing bar, and the lower ends of the curved part are reinforcing bar holding parts having a curvature substantially equal to the diameter of the reinforcing bar inside the intersecting part. Two arm parts extend from the first part toward the front end, one arm part is a connecting arm part connected to the hook part slightly upward and inward, and the other arm part is the other lower end of the curved part The hook arm has a length that extends substantially perpendicularly from the front end to the front end and has a length that can be engaged with a bent locking portion that bends upward from the other lower end of the hook portion, and the tip of the hook arm portion. Is formed by bending outward and bending downward, and engaging with the reinforcing bar holding part that is expanded from the curved part. Reinforcing bar binder, wherein capable of binding the intersection of reinforcing bars from the outside by the resilience of the parts.   2. The reinforcing bar binding tool according to claim 1, wherein the length of the opening between the bent locking portion and the hooking arm portion is formed to be substantially equal to or larger than the hoop muscle diameter when not bound.   The maximum length from the front end to the rear end of the reinforcing bar binding tool in a bound state is a dimension in a range not contacting the adjacent reinforcing bars (90 mm at the minimum). Rebar tying tool.   The reinforcing bar binding tool according to any one of claims 1 to 3, wherein both ends of the reinforcing bar holding part are at least three times the diameter of the hoop bar.   A binding part for binding a reinforcing bar binding device according to any one of claims 1 to 4, comprising a supporting part that engages with the bending locking part, a bending part on which the hooking arm part is carried, and a lever that follows the bending part. Mounting jig.

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