JP2003253814A - Bar arrangement and anchorage method and anchorage used for the same method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bar arrangement and anchorage method allowing a single reinforcement to surely anchor an intermediate hoop to a hoop and to surely anchor the hoop to an axial reinforcement, highly improving the workability compared with the conventional method, and suppressing the cost relatively to low and to provide an anchorage used for the same method. <P>SOLUTION: This bar arrangement and anchorage method suppresses swelling of the hoop and the axial reinforcement disposed inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge and a reinforced concrete column for a building. This method is characterized in that an engagement hole 13 formed in one end part of the anchorage 10 is passed around and engaged with the intermediate hoop 4 beforehand, a hook part 7 approximately vertically bent and formed in an end part of the intermediate hoop is hooked to and arranged in the hoop 3, an engagement hole 14 formed in the other end part of the anchorage is passed around and engaged with the hook part 7 from its tip side, and the intermediate hoop 4 is anchored to the hoop 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar fixing method for suppressing the protrusion of strip reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building, and a method for fixing the reinforcement. The present invention relates to a fixing tool used in the method.

[0002]

2. Description of the Related Art Reinforced concrete structures, for example FIG.
The reinforced concrete column 1 shown in Fig. 1 is designed for earthquake resistance in consideration of plasticization during a large earthquake, and in order to enhance its earthquake resistance, the intermediate strip rebar 4 placed inside the cross section of the column is provided with both ends thereof. The semi-circular hook or the acute-angled hook 5 formed in the above is hooked on the belt reinforcing bar 3 and fixed. As a result, the structure is such that the strip reinforcing bars 3 and the axial reinforcing bars 2 are prevented from protruding outward. However, it is very difficult in construction to form the semicircular hooks or the acute-angled hooks 5 on both ends of the intermediate strip reinforcing bar 4 and hook them on the strip reinforcing bar 3.
Therefore, as shown in FIG. 12 (A), two reinforcing bars 4a,
4b is partially overlapped in the cross section to form an intermediate strip rebar 4, or as shown in FIG. 4B, a structure in which the opposite ends are connected by using a mechanical joint 4c or the like to form the intermediate strip rebar 4 is more conventional. It is used.

By the way, in the method of forming two intermediate reinforcing bars by superposing two reinforcing bars inside the cross section, there is a problem that the construction becomes complicated because the reinforcing bars converge inside the cross section. Further, in the method of connecting with a mechanical joint or the like to form the intermediate strip rebar, it is necessary to separately prepare a joint or the like, which causes a problem of cost increase.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention solves the above-mentioned problems of the prior art, and the fixing of the intermediate strip reinforcing bar to the strip reinforcing bar and the fixing of the strip reinforcing bar to the axial direction reinforcing bar with one reinforcing bar. It is an object of the present invention to provide a bar arrangement fixing method and a fixing tool used for the method, which can reliably perform the workability, can significantly improve the workability of the method, and can keep the cost relatively low. And

[0005]

In order to achieve the above-mentioned object, the invention of the reinforcing bar fixing method according to claim 1 is a strip arranged inside a cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. A reinforcing bar fixing method for suppressing the protrusion of reinforcing bars or axial reinforcing bars, wherein an engaging hole formed at one end of a fixing tool is passed through an intermediate reinforcing bar in advance for engagement, and After hooking a hook portion bent almost at a right angle on the end portion of the reinforcing bar to arrange the reinforcing bar, an engaging hole formed at the other end portion of the fixing tool is passed through the hook portion from its tip side to engage. It is characterized by fixing the intermediate strip reinforcing bar to the strip reinforcing bar by combining.

The invention of the fixing device described in claim 2 is used in the reinforcing bar fixing method according to claim 1, wherein an engaging hole is formed at one end in advance so as to be engageable with the intermediate reinforcing bar. It is characterized in that an engaging hole is formed at the other end so that the hook portion of the intermediate band reinforcing bar can be engaged with the hook portion from the tip side thereof. According to a third aspect of the present invention, there is provided a fixing device according to the second aspect, wherein the engagement hole formed at one end portion and the engagement hole formed at the other end portion are connected to each other by one ring body. It is characterized by

The invention of the reinforcing bar fixing method described in claim 4 is for suppressing the protrusion of strip reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. A method for arranging reinforcing bars, wherein hook portions formed by bending an end portion of an intermediate belt reinforcing bar at a substantially right angle are hooked on the reinforcing bars to arrange the bars, and then an engaging hole formed at one end of the fixing tool is provided with the hook portion. And the engaging hook formed at the other end of the fixing tool is hooked on and engaged with the intermediate strip rebar to fix the intermediate strip rebar to the strip rebar. .

The invention of the fixing device described in claim 5 is used in the reinforcing bar fixing method according to claim 4, in which one end is engaged with the hook portion of the intermediate strip rebar from its tip side. A hole is formed, and an engaging hook that hooks and engages with the intermediate strip reinforcing bar is formed at the other end. The invention of the fixing device described in claim 6 is used in the reinforcing bar fixing method according to claim 4, and is twisted so as to be inverted by 180 ° at the intermediate part, and the tip is attached to the hook part of the intermediate strip rebar at one end From the side, an engaging hole is formed to be engaged therethrough, and the other end portion is provided with a spring property by the twist so that it can be opened and closed, and a pair of engaging hooks that are hooked to and engaged with the intermediate band reinforcing bar are formed. It is characterized by

The invention of a fixing tool described in claim 7 is used in the reinforcing bar fixing method according to claim 4, comprising a ring body, and one end portion of the ring body has a hook portion of an intermediate strip reinforcing bar at its tip. An engaging hole is formed to be engaged therethrough from the side, and an engaging hook is formed at the other end for hooking and engaging with the intermediate reinforcing bar. It is characterized by having an opening / closing piece that tilts inward to open when a load is applied, and returns to its original position and closes when an external load is not applied. The invention of a fixing tool described in claim 8 is used in the reinforcing bar fixing method according to claim 4, comprising a U-shaped main body, and a hook part of the intermediate strip reinforcing bar at one end of the main body on the closed side. An engagement hole is formed which is engaged through from the front end side, and an engagement hook which is hooked and engaged with the intermediate band rebar is formed at the other end portion, and the engagement hook closes the other end portion of the main body. It is characterized by having an obturator that operates.

The invention of a reinforcing bar fixing method according to claim 9 is for suppressing the protrusion of strip reinforcing bars and axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. A method of reinforcing bar arrangement, wherein an engaging hole formed at one end of the fixing tool is preliminarily engaged with the reinforcing bar through a hook, and a hook portion formed by bending the end of the intermediate band reinforcing bar at a substantially right angle. Is hooked into and engaged with an engaging hole formed in the other end of the fixing tool to fix the intermediate strip reinforcing bar to the strip reinforcing bar.

According to a tenth aspect of the present invention, which is used in the reinforcing bar fixing method according to the ninth aspect, there is provided a first ring portion having an engaging hole which is pre-engaged with a reinforcing bar, and And a second ring portion having an engaging hole that is engaged with the ring portion and is bent substantially at a right angle to the end portion of the intermediate strip rebar, and the hook portion is engaged from the tip end side thereof. To do.

The invention of the reinforcing bar fixing method according to claim 11 is for suppressing the protrusion of strip reinforcing bars and axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. A bar arrangement fixing method, which comprises applying a fixing tool to an end portion including a hook portion of an intermediate strip reinforcing bar, and hooking the hook part of the intermediate strip reinforcing bar having the fixing tool attached to the strip reinforcing bar. Is characterized in that the intermediate strip reinforcing bar is fixed to the strip reinforcing bar.

The invention of a fixing device described in claim 12 is used in the reinforcing bar fixing method according to claim 11, and is substantially L-shaped when viewed from the side, and the hook of the intermediate reinforcing bar is provided along the entire length in the longitudinal direction of the bottom surface. It is characterized in that it has a recessed portion that can be attached by covering the end portion including the portion from the upper surface and the side surface.

The invention of the reinforcing bar fixing method according to claim 13 is for suppressing the protrusion of strip reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. In a reinforcing bar arrangement method, an engaging hole formed at one end of a fixing tool is engaged with a strip reinforcing bar in advance, while a hook portion bent at a substantially right angle to the end of the strip reinforcing bar is axially rebar. After arranging by hooking to, the engaging hole formed in the other end portion of the fixing tool is engaged with the hook portion from the tip end side to fix the strip reinforcing bar to the axial reinforcing bar.

The invention of a reinforcing bar fixing method as set forth in claim 14 is for suppressing the protrusion of strip reinforcing bars and axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. A reinforcing bar fixing method, in which a hook formed by bending a right angle at an end of an intermediate belt reinforcing bar is contacted along the reinforcing bar to arrange the bar, and then the hook and the reinforcing bar are fixed by a fixing tool. It is characterized in that the intermediate strip reinforcing bar is fixed to the strip reinforcing bar by clipping.

The invention of a fixing device described in claim 15 is used in the reinforcing bar fixing method according to claim 14, wherein the hook portion of the intermediate strip reinforcing bar and the axial direction of the size capable of clipping the strip reinforcing bar. It is characterized in that it comprises a main body having a hole formed therein, and that the main body is provided with a notch formed in an axial opening for passing a hook portion or a reinforcing bar through the axial hole.

The invention of a fixing tool described in claim 16 is a bar arrangement for suppressing the protrusion of strip bars and axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. A fixing method, in which hook portions formed by bending at a substantially right angle to the end portion of the first strip reinforcing bar are hooked to the axial direction reinforcing bar to arrange the bar, and at the same time bent at the end portion of the second strip reinforcing bar. The hook portion of the first band rebar is contacted and hooked from the side opposite to the hook part of the first band rebar so as to go up and down along the axial rebar, and the bar is arranged. It is possible to fix the strip reinforcing bar to the axial reinforcing bar by engaging the hook portions of the strip reinforcing bar and the second strip reinforcing bar and the first strip reinforcing bar with the engaging portions formed at one end and the other end of the fixing tool. Characterize.

The invention of a fixing tool described in claim 17 is used in the reinforcing bar fixing method according to claim 16, wherein the hook part of the first reinforcing bar and the contact part of the second reinforcing bar are provided at one end. Is formed, and the other end is formed with an engaging portion that engages the hook portion of the second strip reinforcing bar and the contact portion of the first strip reinforcing bar. .

The invention of the reinforcing bar fixing method as set forth in claim 18 is for suppressing the protrusion of strip reinforcing bars and axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. A reinforcing bar fixing method, in which hook portions formed by bending the end portion of the first band reinforcing bar at a substantially right angle are hooked on the axial direction reinforcing bar to arrange the bar and at the same time, at a right angle to the end part of the second band reinforcing bar. The bent hook portion is abutted on the axial reinforcing bar from the side opposite to the hook portion of the first strip reinforcing bar so as to be vertically aligned and hooked to arrange the hook part of the first reinforcing bar and the hook part. Two
The first reinforcing bar is fixed to the axial reinforcing bar by clipping the hook portion of the second reinforcing bar or the second reinforcing bar and the first reinforcing bar with a fixing tool.

The invention of a fixing tool described in claim 19 is used in the reinforcing bar fixing method according to claim 18, wherein the hook portion of the first band reinforcing bar and the second band reinforcing bar or the second band reinforcing bar is used. The main body includes an axial hole having a size capable of clipping the hook portion and the first reinforcing bar, and the main body has an axial opening for passing the hook portion or the reinforcing bar through the axial hole. The portion is notched.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 show a first embodiment. FIG. 1 shows a set of a plurality of axial reinforcing bars, band reinforcing bars and intermediate band reinforcing bars arranged in the cross section of a reinforced concrete column as shown in FIGS. 11 and 12 for convenience of explanation. In the figure, 2 is an axial rebar, 3
Indicates a strip reinforcing bar, and 4 indicates an intermediate strip reinforcing bar. Here, a method of fixing the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 by using the metal connector 10 as a fixing tool is illustrated.

As shown in FIG. 2, the connector 10 comprises a flat metal ring body 11. The ring body 11 has a hole portion 12 having a size through which the intermediate band reinforcing bar 4 and the band reinforcing bar 3 can be inserted in the length direction, and the hole part is formed at the engaging hole 13 formed at one end and at the other end. The formed engaging holes 14 are formed by communicating with each other. Further, a hook portion 7 is formed by bending the end portion of the intermediate strip reinforcing bar 4 at a substantially right angle.
The length of the hook portion 7 is smaller than the length of the hole portion 12 of the ring body 11.

In order to fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 using the connector 10, the engaging hole 13 of the connector 10 is previously passed through the intermediate strip reinforcing bar 4 from the tip end side of the hook portion 7 and the engaging hole 14 is formed.
Are engaged downward in a downward direction (Fig. 1, left view).
Then, the hook portion 7 of the intermediate strip reinforcing bar 4 with which the connector 10 is engaged is hooked on the strip reinforcing bar 3 so that the tip thereof is directed downwards and arranged. Thereafter, the engaging hole 14 of the connector 10 is engaged with the hook portion 7 from the tip side thereof as shown by an arrow (the right drawing in FIG. 1). As a result, the strip reinforcing bar 3 is restrained by the intermediate strip reinforcing bar 4 and the connector 10, and the intermediate strip reinforcing bar 4 is
Fixed in. Before the concrete is poured, both ends of the intermediate strip rebar 4 and the connector 10 are connected by a wire 15 or the like to prevent the connector 10 from falling off. This work is a modification example described below and the second embodiment. The same applies to the following embodiments.

FIG. 3 shows a modification of FIGS. 1 and 2, in which a metal connector 18 having an engaging hole 16 formed at one end and an engaging hook 17 formed at the other end is used. To fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 by using the connector 18, hook the hook 7 formed by bending the end of the intermediate strip reinforcing bar 4 at a substantially right angle to the strip reinforcing bar 3 so that its tip faces downward. Then, the engaging hole 16 of the connector 18 is passed through the hook portion 7 of the intermediate strip reinforcing bar 4 from the tip end side thereof to engage with the engaging hook 17, and the engaging hook 17 is engaged with the intermediate strip reinforcing bar 4 by hooking. As a result, the strip reinforcing bar 3 is restrained by the intermediate strip reinforcing bar 4 and the connector 18, and the intermediate strip reinforcing bar 4 is fixed to the strip reinforcing bar 3.

FIGS. 4A, 4B and 4C show modifications of the metal connector used in the reinforcing bar fixing method of FIG. The connector 21 of FIG. 4 (A) is 180 ° in the middle part.
It is twisted so as to be inverted, an engagement hole 22 is formed at one end, and a pair of engagement hooks 23 are provided at the other end so as to be openable and closable by imparting a spring property by the twist. In order to fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3, the engaging hole 22 of the connector 21 is passed through the hook portion 7 of the intermediate strip reinforcing bar 4 from its tip end side and engaged, and the engaging hook 23 is opened to open the intermediate strip reinforcing bar. It is hooked on 4, then closed and engaged.

The connector 25 of FIG. 4B is a ring body 26.
And an engagement hole 27 is formed at one end of the ring body,
An engaging hook 28 is formed at the other end. The engagement hook 28 has an opening / closing piece 29 in a part of the ring body 26.
That is, one end of the opening / closing piece 29 is pivotally supported by the pivot pin 30 and is normally urged to a closing position as shown by a tension spring (not shown). When an external load is applied, the opening / closing piece 29 tilts inside the ring body 26. Open, and when no external load is applied, the spring returns to the original closed position. Opening piece 2
The other end surface of 9 is formed into an inclined surface, and can be engaged with the inclined surface formed on the end surface of the corresponding ring body 26 by abutting against it. In order to fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 by the connector 25, the engaging hole 27 of the connector 25 is provided in the intermediate strip reinforcing bar 4.
The engaging hook 28 is engaged with the hook portion 7 from the front end side thereof, and the engaging hook 28 is opened and hooked by pressing the opening / closing piece 29 against the intermediate strip rebar 4 and then closed and engaged.

The connector 32 of FIG. 4C has a U-shaped main body 33, an engaging hole 34 is formed at one closed end of the main body, and an engaging hook 35 is formed at the other end. . The engagement hook 35 has a closing tool 36 that closes the other end of the main body 33. The obturator 36 is composed of a bolt 36a inserted into a mounting hole (not shown) provided at the other end of the main body 33, and a nut 36b screwed into the bolt. In order to fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 by this connector 32, the engaging hole 34 of the connector 32 is engaged with the hook portion 7 of the intermediate strip reinforcing bar 4 from its tip end side, and the closure 3
After the other end of the main body 33 on the open side before attachment is passed through the intermediate strip rebar 4, the bolt 36a is inserted through the attachment hole, and the nut 36b is screwed and tightened. This causes the obturator 36 to form the engagement hook 35,
The hook is hooked on the intermediate strip reinforcing bar 4 and engaged.

FIG. 5 shows a second embodiment. In this embodiment, a first ring portion 39 having an engagement hole 38,
A metal connector 42 having a second ring portion 41 connected to the ring portion and having an engagement hole 40 is used. In order to fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 using the connector 42, the engaging hole 38 of the connector 42 is previously passed through the strip reinforcing bar 3 and engaged therewith. Then, the hook portion 7 of the intermediate band reinforcing bar 4 is engaged with the engaging hole 40 of the connector 42 so that the tip of the hook portion 7 faces downward.
To engage. Thereby, the intermediate reinforcing bar 4 is fixed to the reinforcing bar 3.

FIG. 6 shows a third embodiment. In this embodiment, a metal connector 43 having a substantially L-shape and a substantially U-shaped cross section is used as seen from the side surface which is attached to the end of the intermediate strip rebar 4 including a part of the hook 7. Connector 43
Has a recess 44 that can be attached to cover the intermediate strip rebar 4 from the upper surface and the side face, in the entire length of the bottom surface in the longitudinal direction, and the intermediate strip rebar 4 is attached to fit into the recess. To fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 using this connector 43, the connector 43 is attached to the end portion of the intermediate strip reinforcing bar 4 as shown in the drawing. Then, the hook portion 7 of the intermediate reinforcing bar 4 to which the connector 43 is attached is hooked on the reinforcing bar 3 to arrange the bars. As a result, the strip reinforcing bar 3 is restrained by the intermediate strip reinforcing bar 4 and the connector 43, and the intermediate strip reinforcing bar 4 is fixed to the strip reinforcing bar 3.

FIG. 7 shows a fourth embodiment. In this embodiment, the connector 10 shown in the first embodiment is used. To fix the reinforcing bar 3 to the axial reinforcing bar 2 using the connector 10, the engaging hole 13 of the connector 10 is engaged with the reinforcing bar 3 in advance. Then, after hooking the hook portion 45 formed by bending the end portion of the strip reinforcing bar 3 at a substantially right angle to the axial direction reinforcing bar 2, the engaging hole 14 formed at the other end of the connector 10 is inserted into the engaging hole 14 of the strip reinforcing bar 3. The hook 45 is engaged from the tip side thereof. As a result, the axial rebar 2 becomes the strip rebar 3
With the connector 10, the strip reinforcing bar 3 is fixed to the axial reinforcing bar 2.

FIG. 8 shows a fifth embodiment. In this embodiment, a hook portion 46 formed by bending the end portion of the intermediate strip reinforcing bar 4 at a substantially right angle and a hook portion 47 formed by bending at a front end portion thereof at a substantially right angle are substantially U-shaped.
A main body 50 bent in a letter shape and having an axial hole 48 having a size capable of clipping the hook portion 46 and the reinforcing bar 3 is provided, and the main body 50 is provided with the hook portion 46 or the reinforcing bar 3. A metal clip 52 is used in which an axial opening 51 for passing through the axial hole 48 is cut out. In order to fix the intermediate strip reinforcing bar 4 to the strip reinforcing bar 3 using the clip 52, the hook portion 46 of the intermediate strip reinforcing bar 4 is brought into contact with the strip reinforcing bar 3 so as to be arranged, and then the hook portion and the strip reinforcing bar are arranged. 3 is passed through the axial hole 48 of the main body 50 and clipped as shown in FIG. This clip is performed by pressing the hook portion 46 and the band reinforcing bar 3 with each other by a frictional force, but other methods may be used. As a result, the strip reinforcing bar 3 is restrained by the intermediate strip reinforcing bar 4 and the clip 52, and the intermediate strip reinforcing bar 4 is fixed to the strip reinforcing bar 3.

FIG. 9 shows a sixth embodiment. In this embodiment, the whole is made of a wire rod, and an engaging portion 56 for engaging the hook portion 55 of the first band reinforcing bar 3a and the abutting portion of the second band reinforcing bar 3b is formed at one end portion, and the other end portion is formed. To the second rebar 3b
The metal connector 60 in which the hook portion 57 and the engaging portion 58 for engaging the contact portion of the first reinforcing bar 3a are formed is used. To fix the reinforcing bars 3a, 3b to the axial reinforcing bar 2 by using this connector 60, the hook portion 55 of the first reinforcing bar 3a is hooked on the axial reinforcing bar 2 to arrange the bar and the second reinforcing bar 3b. After hooking the hook portion 57 of the first strip rebar 3a from the side opposite to the hook portion 55 of the first strip rebar 3a so as to be aligned with the axial rebar 2 and hooking it, the first strip rebar 3a
Hook portion 55, second reinforcing bar 3b, and second reinforcing bar 3
The hook portion 57 of b and the first reinforcing bar 3a are engaged with each other by engaging portions 56 and 58 formed at one end and the other end of the connector 60. As a result, the first reinforcing bar 3a and the second reinforcing bar 3b are fixed to the axial reinforcing bar 2.

FIG. 10 shows a seventh embodiment. In this embodiment, the hook portion 55 of the first rebar 3a and the hook portion 57 of the second rebar 3b or the second rebar 3b and the first
The main body 63 is provided with an axial hole 62 having a size capable of clipping the strip reinforcing bar 3a, and the main body 63 has an axial opening 64 for passing the hook portion or the strip reinforcing bar through the axial hole 62. A metal clip 65 having a cutout is used. In order to fix the reinforcing bars 3a, 3b to the axial reinforcing bar 2 using the clip 65, the hook portion 55 of the first reinforcing bar 3a is hooked on the axial reinforcing bar 2 and arranged, and the second reinforcing bar 3b is also arranged. After hooking the hook portion 57 of the first strip rebar 3a from the side opposite to the hook portion 55 of the first strip rebar 3a so as to be aligned with the axial rebar 2 and hooking it, the first strip rebar 3a
The hook portion 55 and the second reinforcing bar 3b are clipped with a clip 65 as shown in FIG. This clip is also performed by pressing the hook portion 55 and the band reinforcing bar 3b into contact with each other by a frictional force, but other methods may be used. As a result, the first reinforcing bar 3a and the second reinforcing bar 3b are fixed to the axial reinforcing bar 2. In this case, the clip 65 may clip the hook portion 57 of the second reinforcing bar 3b and the first reinforcing bar 3a, or both of them.

In each of the above-mentioned embodiments, the metal connectors 10, 18, 21, 25, 32, 42, 4 are used as fixing devices.
3, 60 or the metal clips 52, 65 have been described, but this is merely a preferable example, and the present invention is not limited to such a metal connector or metal clip. Further, the material does not necessarily have to be a metal (steel material), and other materials such as FRP or fiber material may be used. Further, it is needless to say that the specific shape, structure, etc. of the metal connector or the metal clip shown in the embodiment may be variously changed or modified in designing. Further, in each of the above-described embodiments, the reinforced concrete column has been described as an example, but it can be applied to various reinforced concrete structures.

[0035]

The present invention is as described above, and according to the reinforcing bar fixing method described in claims 1, 4, 9, 11, 13, 14, 16, 18, one intermediate bar is formed by one reinforcing bar. The fixing of the reinforcing bar to the strip reinforcing bar and the fixing of the strip reinforcing bar to the axial direction reinforcing bar can be performed very easily and surely, and the workability can be markedly improved as compared with the conventional one. Therefore, even if the cover concrete of a reinforced concrete column separates due to large plastic deformation during a large earthquake, the core concrete is constrained by the intermediate strip rebar anchored in the strip rebar, so that the outside reinforcement of the strip rebar and the axial rebar does not occur. Dashi can be suppressed, damage can be suppressed to a minimum, and it has excellent earthquake resistance. Further, unlike the conventional case, since no mechanical joint or the like is used, the cost can be kept relatively low. Furthermore, claims 2, 3, 5, 6, 7, 7, 8, 10, 12, 1
According to the fixing tools described in Nos. 5,17,19, there is an excellent effect that the workability can be enhanced when the reinforcing bar fixing method is performed.

[Brief description of drawings]

FIG. 1 is a main part perspective view showing a first embodiment of the present invention.

FIG. 2 is a front view of the fixing fitting of the above.

FIG. 3 is a perspective view of an essential part showing a modified example of the above.

FIG. 4 is a front view showing various modified examples of the fixing fitting used in the modified example.

FIG. 5 is a perspective view of an essential part showing a second embodiment.

FIG. 6A is a perspective view of an essential part showing a third embodiment, and FIG. 6B is a sectional view taken along line BB of FIG.

FIG. 7 is a perspective view of an essential part showing a fourth embodiment.

FIG. 8A is a perspective view of an essential part showing a fifth embodiment, and FIG. 8B is a sectional view taken along line BB of FIG.

FIG. 9 is a main part perspective view showing a sixth embodiment.

FIG. 10A is a perspective view of an essential part showing a seventh embodiment, and FIG. 10B is a sectional view taken along line BB of FIG.

FIG. 11 is a cross-sectional view of the inside of the cross section of a reinforced concrete column showing a conventional example.

12 (A) and 12 (B) are cross-sectional views of the inside of the cross section of a reinforced concrete column showing a conventional example.

[Explanation of symbols]

1 reinforced concrete columns
2 Axial rebar 3 Band rebar
3a 1st strip reinforcement 3b 2nd strip reinforcement
4 Intermediate band rebar 7, 45, 46, 47, 55, 57 Hook part 10, 18, 21, 25, 32, 42, 43, 60 Metal connector (fixing tool) 52, 65 Metal clip (fixing tool) 11 Made of metal Ring body
12 holes 13, 14, 16, 22, 27, 34, 38, 40 engaging holes 17, 23, 28, 35 engaging hooks
26 ring body 26 29 opening / closing piece
30 pivot pin 33 U-shaped body
36 Obturator 39 First ring part
41 Second ring portion 48, 62 Axial hole
50,63 Main body 51,64 Axial opening
56,58 Engagement part

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 000166432             Toda Construction Co., Ltd.             1-7-1, Kyobashi, Chuo-ku, Tokyo (71) Applicant 000183325             Sumitomo Construction Co., Ltd.             4 at 13 Araki-cho, Shinjuku-ku, Tokyo (71) Applicant 000112196             PS Mitsubishi Corporation             7-16-12 Ginza, Chuo-ku, Tokyo (71) Applicant 000219875             Tokyu Construction Co., Ltd.             1-16-14 Shibuya, Shibuya-ku, Tokyo (72) Inventor Shigeki Unjou             6-1 Nambara, Tsukuba City, Ibaraki Prefecture             Civil Engineering Research Institute (72) Inventor Junichi Hoshikuma             6-1 Nambara, Tsukuba City, Ibaraki Prefecture             Civil Engineering Research Institute (72) Inventor Ryohiko Shiojima             6-1 Nambara, Tsukuba City, Ibaraki Prefecture             Civil Engineering Research Institute F-term (reference) 2E164 AA02 AA25 BA34 CA12 CA39

Claims (19)

[Claims] 1. A reinforcing bar fixing method for suppressing the protrusion of strip reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building, which is one end of a fixing tool. While engaging the engaging hole formed in the part through the intermediate strip reinforcing bar in advance, after hooking the hook part formed by bending the end part of the intermediate strip reinforcing bar at a substantially right angle to the strip reinforcing bar and arranging, A reinforcing bar fixing method, characterized in that an intermediate strip reinforcing bar is fixed to a strip reinforcing bar by engaging an engaging hole formed at the other end of the fixing tool with the hook part from the tip side thereof to engage with the hook part. 2. The reinforcing bar fixing method according to claim 1, wherein an engaging hole is formed at one end in advance so as to be engageable with the intermediate rebar, and the other end has a hook portion of the intermediate rebar. A fixing tool having an engaging hole formed through the front end of the fixing hole. 3. The fixing device according to claim 2, wherein the engagement hole formed at one end portion and the engagement hole formed at the other end portion are composed of a single ring body that communicates with each other. 4. A reinforcing bar fixing method for suppressing the protrusion of strip reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. After hooking the hook portion formed by bending the end portion at a substantially right angle to the bar reinforcing bar, the engaging hole formed at one end portion of the fixing tool is engaged with the hook portion through the tip side thereof, A reinforcing bar fixing method characterized in that an engaging hook formed at the other end of the fixing tool is hooked on and engaged with an intermediate reinforcing bar to fix the intermediate reinforcing bar to the reinforcing bar. 5. The reinforcing bar fixing method according to claim 4, wherein an engaging hole is formed at one end for engaging the hook portion of the intermediate strip reinforcing bar from the tip side thereof, and the other end is provided with the engaging hole. A fixing tool, characterized in that an engaging hook is formed which hooks and engages with the intermediate strip reinforcing bar. 6. The reinforcing bar arrangement method according to claim 4, wherein the intermediate part is twisted so as to be inverted by 180 °, and one end is engaged with a hook part of the intermediate strip rebar from its tip side. An engagement hole is formed, a spring property is imparted to the other end by the twist so as to be opened and closed, and a pair of engagement hooks that are hooked and engaged with the intermediate band reinforcing bar are formed. Fixing tool. 7. The method according to claim 4, further comprising a ring body, wherein one end of the ring body is engaged with a hook portion of an intermediate strip reinforcing bar from an end thereof to engage with the hook hole. Is formed, and an engaging hook that hooks and engages with the intermediate strip reinforcing bar is formed at the other end, and the engaging hook opens inwardly when a part of the ring body is subjected to an external load. ,
A fixing tool having an opening / closing piece that returns to its original position and closes when no external load is applied. 8. The reinforcing bar fixing method according to claim 4, further comprising a U-shaped main body, wherein one end of the main body on the closed side is engaged with the hook portion of the intermediate strip rebar from the tip side thereof. An engaging hole is formed, and an engaging hook that hooks and engages with the intermediate strip reinforcing bar is formed at the other end, and the engaging hook has a closing tool that closes the other end of the main body. A characteristic fixing tool. 9. A reinforcing bar fixing method for suppressing the protrusion of strip reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building, which is one end of a fixing tool. While engaging the engaging hole formed in the portion through the strip reinforcing bar in advance, the hook portion formed at the other end of the fixing tool is bent at a substantially right angle to the end of the intermediate strip reinforcing bar. A reinforcing bar fixing method characterized in that an intermediate strip reinforcing bar is fixed to a strip reinforcing bar by hooking and engaging with a dowel hole. 10. A first ring part having an engaging hole to be pre-engaged with a reinforcing bar and an intermediate band reinforcing bar connected to the ring part, which is used for the reinforcing bar fixing method according to claim 9. And a second ring portion having an engaging hole that is engaged with the hook portion formed at a substantially right angle at the end portion of the fixing portion. 11. A reinforcing bar fixing method for suppressing the protrusion of strip reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building, the fixing tool being an intermediate member. After attaching to the end portion including the hook portion of the strip reinforcing bar, the hook portion of the intermediate strip reinforcing bar to which the fixing tool is attached is hooked on the strip reinforcing bar to arrange the intermediate strip reinforcing bar to the strip reinforcing bar. A characteristic method of reinforcing the bar arrangement. 12. The method for reinforcing bar arrangement according to claim 11, wherein the end is substantially L-shaped when viewed from the side, and the end including the hook portion of the intermediate strip rebar is provided from the top surface and the side surface in the entire length in the length direction of the bottom surface. A fixing tool having a recess that can be covered and attached. 13. A reinforcing bar fixing method for suppressing the protrusion of strip bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building, which is one end of a fixing tool. While engaging the engaging hole formed in the portion with the strip reinforcing bar in advance, after hooking the hook portion formed by bending the end portion of the strip reinforcing bar at a substantially right angle to the axial direction reinforcing bar to arrange the bar, A reinforcing bar fixing method characterized in that a belt reinforcing bar is fixed to an axial reinforcing bar by engaging an engaging hole formed at the other end with the hook part from the tip side thereof. 14. A reinforcing bar fixing method for suppressing squeezing out of reinforcing bars or axial reinforcing bars arranged inside the cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building, which comprises: After hooking the hook part that is bent almost at a right angle to the end so as to be along the strip reinforcing bar and arranging it, the hook part and the strip reinforcing bar are clipped by the fixing tool to fix the intermediate strip reinforcing bar to the strip reinforcing bar. A method for fixing a bar arrangement characterized by: 15. A body for use in the reinforcing bar fixing method according to claim 14, comprising a main body formed with an axial hole having a size capable of clipping the hook portion of the intermediate bar and the bar. A fixing tool characterized in that an axial opening is formed in the main body so as to allow a hook portion or a reinforcing bar to pass through the axial hole. 16. A reinforcing bar fixing method for suppressing squeezing out of strip reinforcing bars and axial reinforcing bars arranged inside a cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building. The hook portion formed by bending the end portion of the reinforcing bar at a substantially right angle is hooked on the axial reinforcing bar to arrange the bar, and the hook portion formed by bending at a substantially right angle at the end portion of the second strip reinforcing bar is formed into the first strip reinforcing bar. From the side opposite to the hook part of the axial direction rebar so as to be in contact with the axial direction rebar so as to vertically hang and arrange the bar, and then the hook part of the first band rebar and the hook of the second band rebar and the hook of the second band rebar A reinforcing bar fixing method, characterized in that the first reinforcing bar and the first reinforcing bar are engaged with engaging portions formed at one end and the other end of the fixing tool to fix the reinforcing bar to the axial reinforcing bar. 17. The method for fixing the reinforcing bar according to claim 16, wherein an engaging portion for engaging the hook portion of the first rebar and the contact portion of the second rebar is formed at one end. The fixing device is characterized in that an engaging portion for engaging the hook portion of the second rebar and the contact portion of the first rebar is formed at the other end. 18. A reinforcing bar fixing method for suppressing squeezing out of strip reinforcing bars or axial reinforcing bars arranged inside a cross section of a reinforced concrete structure such as a reinforced concrete bridge pier or a reinforced concrete column of a building, which is the first strip. The hook portion formed by bending the end portion of the reinforcing bar at a substantially right angle is hooked on the axial reinforcing bar to arrange the bar, and the hook portion formed by bending at a substantially right angle at the end portion of the second strip reinforcing bar is formed into the first strip reinforcing bar. The hook portion of the first rebar and the hook of the second rebar or the second rebar after contacting and hooking the axial rebar from the side opposite to the hook part so as to be aligned vertically. A reinforcing bar fixing method, characterized in that the strip reinforcing bar is fixed to the axial reinforcing bar by clipping the portion and the first reinforcing bar with a fixing tool. 19. A clip used for the reinforcing bar fixing method according to claim 18, wherein the hook portion of the first strip reinforcing bar and the second strip reinforcing bar or the hook portion of the second strip reinforcing bar and the first strip reinforcing bar are clipped. A main body having an axial hole of a size capable of being formed, wherein the main body has a notch formed with an axial opening for passing a hook portion or a reinforcing bar through the axial hole. And a fixing tool.