JPH09158399A - Execution method of reinforced-concrete building frame and joint clip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out the execution of works quickly and easily regardless of the kinds of reinforcements. SOLUTION: Joint clips C for fixing a reinforcement 15 and a tie reinforcement 25 under a crossed state are prepared, and a plurality of the reinforcements are arranged in parallel in one direction and the tie reinforcements are fixed by using the joint clips C while being ceossed with the reinforcements when a reinforced-concrete building frame is executed, thus manufacturing one-way mesh. The reinforced-concrete building frame is constructed by arranging the reinforcements to a column or a beam by utilizing one-way mesh.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a reinforced concrete skeleton and a joint clip preferably used for this method.

[0002]

2. Description of the Related Art In recent years, various construction methods have been proposed and put into practical use in order to rationalize the construction of civil engineering structures. However, regarding the work of arranging the reinforcing bars when constructing a reinforced concrete structure, The automation and mechanization have not been fully realized, and it is the actual situation that the work is still mainly performed by the workers.

In fixing the hoop reinforcement or stirrup reinforcement to the main reinforcement constituting the column reinforcement or beam reinforcement in the above-mentioned bar arrangement work, each hoop reinforcement or stirrup reinforcement is individually fixed. Instead of doing so, a so-called mesh method of fixing a hoop unit or a stapling unit in which a plurality of units are unitized in a mesh shape may be adopted.

The unitization of the hoop muscles or stirrup muscles is carried out by arranging a plurality of rebars in parallel in a state where they are separated from each other by a predetermined distance, then crossing the plurality of rebars to bridge the connecting rebars and It has been performed to fix each crossing portion between the connecting bar and the connecting reinforcing bar by connecting with wire or by welding.

[0005]

However, in the above-mentioned conventional mesh construction method, there is a problem that it takes time and labor because the hoop muscles or the stirrup muscles are unitized by connecting them one by one with a wire.

[0006] Further, when the hoop reinforcement or the stirrup reinforcement is unitized by welding, it cannot be applied to high-strength reinforcement used in, for example, super high-rise reinforced concrete construction, that is, it can be applied to different types of reinforcement. There was a problem that there were restrictions.

The present invention has been made in view of the above circumstances, and is a method for constructing a reinforced concrete skeleton that can be implemented quickly and easily and can be applied regardless of the type of rebar,
And it aims at providing the joint clip used suitably for this method.

[0008]

In the method for constructing a reinforced concrete frame according to claim 1, which is a method for constructing a reinforced concrete frame, the reinforcing bar is gripped in the axial direction of the body by expanding and contracting the inlet portion in advance. First for
And an axis line that is offset from the axis line of the first annular body in order to fix the annular body and the connecting reinforcing bar arranged in a state intersecting with the reinforcing bar to the reinforcing bar in the intersecting state. Then, a joint clip is provided, which is fixed to the first annular body and has a second annular body for gripping the connecting rebar in the axial direction of itself by expanding and contracting the inlet portion. When constructing a reinforced concrete frame, after arranging a plurality of rebars in parallel in a state in which they are spaced apart from each other by a predetermined distance in one direction, crossing the plurality of rebars and bridging the connecting rebars with these rebars Produce a one-way mesh by fixing each intersection between the connecting reinforcing bars using the joint clip,
Bending the one-way mesh in the length direction to produce a hoop unit or stapling unit, fixing the hoop unit or stapling unit to the main rebar to produce a column rebar or beam rebar, and surrounding the column rebar or beam rebar It is characterized in that a reinforced concrete skeleton is constructed by constructing a mold and then placing concrete in the mold. The joint clip according to claim 2, which is a joint clip for fixing two rebars in a crossed state, for gripping the first rebar in the axial direction of itself by expanding and contracting the inlet portion. First of
Axis of the first annular body for fixing the annular body and the second reinforcing bar arranged in an intersecting state with respect to the first reinforcing bar to the first reinforcing bar in the intersecting state. And a second annular body fixed to the first annular body with an axis that is deviated and holding the second rebar in its own axial direction by expanding and contracting the inlet portion. It is characterized by doing. In the joint clip according to claim 3, in the joint clip according to claim 2, the inner surfaces of the first and second annular bodies are provided with projections for engaging projections formed on the surface of the reinforcing bar. It is characterized in that a recess is formed so that the part protrudes.

According to the first aspect of the present invention, by using the joint clip, a plurality of parallel-arranged reinforcing bars are connected and fixed by the reinforcing bars, that is, a unidirectional mesh is manufactured quickly and easily. . Therefore, the hoop reinforcement or the stirrup reinforcement can be unitized quickly and easily, and the construction of the reinforced concrete frame can be performed quickly and easily. Further, by mechanically fixing the reinforcing bars and the connecting reinforcing bars, the invention can be applied to any kind of reinforcing bars. According to the invention described in claim 2, each rebar is inserted into the inside of each annular body by expansion / contraction of each inlet portion of the corresponding annular body, that is, each inlet portion expands, and each inlet portion contracts. It is gripped in the inserted state. Therefore, the first and second reinforcing bars are quickly and easily gripped by the first and second annular bodies. In addition, by mechanically fixing the reinforcing bars together, they can be applied regardless of the type of reinforcing bars. According to the invention as set forth in claim 3, since the inner surface of each annular body is formed with a recess for engaging the protrusion formed on the surface of the reinforcing bar, the recess is formed in a direction in which the protrusion protrudes. When each reinforcing bar is gripped by the corresponding annular body, even if it is attempted to move each reinforcing bar relative to the corresponding annular body, the convex portion of the reinforcing bar surface is locked in the recess on the inner surface of the annular body. Therefore, the movement is blocked.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for constructing a reinforced concrete skeleton and a joint clip according to the present invention will be described below with reference to the drawings.

[First Embodiment] FIGS. 1 and 2 show a first embodiment of a joint clip suitably used in a method for constructing a reinforced concrete skeleton of the present invention. In the drawings, a joint clip C is Annular body 10 (first
Annular body), annular body 20 (second annular body), common wall portion 3
It mainly consists of 0.

The annular bodies 10 and 20 are integrally formed on both sides of the common wall portion 30, and are arranged with their axes offset from each other by 90 °.

The annular body 10 has a short side portion 11 and a long side portion 1.
2. Short side 11 and long side 1
The open ends of 2 are curved pieces 11a and 12a that are curved outward as illustrated. Curved pieces 11a, 12a
The spaces are separated by a predetermined distance. In other words, the annular body 10 has an opening portion between the ends of the short side portion 11 and the long side portion 12, and this portion is the inlet portion 13. . Further, in each of the short side portion 11 and the long side portion 12, when the reinforcing bar 15 (first reinforcing bar) is gripped inside the annular body 10, the node 15 a (convex portion, in the illustrated example, so-called so-called in the illustrated example) A recess 16 is formed from the inner surface toward the outer surface to engage with the joint 15a, which has a shape corresponding to the joint 15a.

The annular body 20 has the same structure as the annular body 10, and has a short side portion 21, a long side portion 22, and curved pieces 21a and 22.
a has an inlet portion 23, and when the reinforcing bar 25 (second reinforcing bar) is gripped inside the annular body 20, in order to engage the node 25a (convex part) of the reinforcing bar 25, the same A recess 26 is formed in the.

Next, a method of manufacturing the joint clip C having the above structure will be described. The joint clip C is spring steel cut out from a spring steel material in the shape shown in the development view of FIG. That is, the short side portion 11 and the long side portion 12 are formed on both sides of the common wall portion 30 to form the annular body 10.
And the annular body 20 at a position offset from these by 90 °
In order to form, the common wall portion 30 is cut out so as to have a short side portion 21 and a long side portion 22 on both sides. Then, the short side portion 11 and the long side portion 12 are provided with recesses 16 projecting toward the front side from the drawing paper surface, and the short side portions 21 and the long side portion 22 are recessed toward the back side from the drawing paper surface Form the recess 26. Then, the short side portion 11 and the long side portion 12 are bent to form the annular body 10 and the curved pieces 11a and 12a. Similarly,
The short side portion 21 and the long side portion 22 are bent to form the annular body 20 and the curved pieces 21a and 22a are formed, and the production of the joint clip C is completed.

Then, a method of using the joint clip C will be described. In order to grip the reinforcing bar 15 in the annular body 10, the reinforcing bar 15 is pressed inward from the inlet portion 13 of the annular body 10. Then, the curved pieces 11a and 12a are pushed apart, that is, the inlet portion 13 is expanded to insert the reinforcing bar 15 into the inside of the annular body 10, and after the reinforcing bar 15 is housed in the annular body 10, The reinforcing bar 15 is gripped by the annular body 10 in a state where the reinforcing bar 13 is inserted due to the contraction of 13. That is, by expanding and contracting the inlet portion 13, the reinforcing bar 15 can be snapped into the annular body 10 with one touch. The method of gripping the reinforcing bar 25 by the annular body 20 is exactly the same.

In this manner, by gripping the reinforcing bars 15 and 25 by the annular bodies 10 and 20, respectively, the annular body 1
Based on the fact that the axes of 0 and 20 are deviated by 90 °, the reinforcing bars 15 and 25 can be fixed in a 90 ° offset orthogonal state.

Now, an example of a method of constructing a reinforced concrete frame using the joint clip C will be described. Before installation, make a number of joint clips.

Then, as shown in FIG. 3, a unidirectional mesh 40 and a hoop unit 50 are manufactured by the following procedure,
The pillar rebar 60 is manufactured. The unidirectional mesh 40 is manufactured by
After arranging a plurality of hoop muscles 41 (reinforcing bars) in parallel in a state in which they are spaced apart from each other by a predetermined distance, the necessary number of connecting rebars 42 are bridged across the plurality of hoop muscles 41 at a right angle. Hoop muscle 41 and connecting rebar 42
This is done by fixing each intersection 43 between and using the joint clip C described above. Hoop unit 50
The unidirectional mesh 40 is manufactured in the longitudinal direction by, for example, FIG.
It is performed by bending at the position shown by arrow A in (a). The pillar rebar 60 is manufactured by entwining the hoop unit 50 thus obtained with the pillar main bar (main bar) as shown in FIG. To do.

In parallel with the production of the column rebar 60, as shown in FIG. 4, the unidirectional mesh 70 and the stapling unit 80 are produced in the following procedure to produce the beam rebar 90.
The unidirectional mesh 70 is manufactured by using a plurality of stapling muscles 71.
After arranging the (reinforcing bars) in parallel in a direction away from each other by a predetermined distance, the plurality of stirrup bars 7
This is done by connecting the required number of connecting reinforcing bars 72 in a direction orthogonal to 1 and fixing each intersection 73 between these stirrup reinforcing bars 71 and connecting reinforcing bars 72 using the above-mentioned joint clip C. For manufacturing the stapling unit 80, the unidirectional mesh 70 is formed in the longitudinal direction, for example, as shown in FIG.
It is performed by bending at the position indicated by the arrow B in. The beam reinforcing bar 90 is manufactured by using the thus obtained stapling unit 80 as shown in FIG. 4 (c).
For example, as shown in the figure, it is carried out by grounding by fixing it by being entangled with the beam main bars (main bars). In this case, regarding the upper surface of the stapling unit 80 in which no stirrup streak exists, the stirrup streak is individually fixed at the time of FIG. You may.

After that, the above-mentioned pillar reinforcement 60 and beam reinforcement 9
About the construction procedure of the reinforced concrete frame using 0,
With reference to FIG. 5, a case will be described as an example where columns and beams are integrally formed for a certain floor.

First, as shown in FIG. 5 (a), a column reinforcing bar 60 is erected on the upper portion 60 'of the column main reinforcement below, and is entwined and fixed to the upper portion 60' of the column main reinforcement below. Then, as shown in FIG. 5B, the form 60a is constructed around the pillar rebar 60, and the floor form 60b and the beam receiving form 90a are constructed. Further, as shown in FIG. 5C, the beam reinforcing bar 90 is built on the beam receiving form 90a,
It is entangled and fixed to the column main bar 60. This allows
The situation as shown in FIG. 5D is obtained. After that, beam rebar 9
A formwork (not shown) is built around 0, and concrete is placed in the formwork 60a around the column rebar 60 and the formwork around the beam rebar 90 to obtain a reinforced concrete frame composed of columns and beams. .

In the above, the exposed length H of the column rebar 60
Is preferably a length obtained by adding the height H2 of the beam reinforcing bar 90 to the exposed length H1 for connecting to the upper floor.

According to the above method for constructing a reinforced concrete frame, by using the joint clip C, the unidirectional meshes 40, 70 can be manufactured quickly and easily. Therefore, the hoop unit 50 or the stapling unit 80 can be quickly and easily formed, and as a result, the reinforced concrete skeleton can be quickly and easily constructed.

Further, the hoop muscle 41 or the stirrup muscle 7
By mechanically fixing 1 and the connecting rebars 42 and 72, it can be applied regardless of the type of rebar.

On the inner surface of the annular bodies 10 and 20, the reinforcing bars 15 and
A recess 1 recessed in a direction in which the nodes 15a and 25a project to engage the nodes 15a and 25a formed on the surface of the node 25.
Since 6 and 26 are formed, the nodes 15a on the surface of the reinforcing bar,
25a is locked in the recesses 16 and 26 on the inner surface of the annular bodies 10 and 20, and the relative movement of the reinforcing bars 15 and 25 with respect to the corresponding annular bodies 10 and 20 can be prevented. The reinforcing bars 15, 25 can be firmly and reliably gripped by the annular bodies 10, 20.

Further, the curved pieces 11 are provided on the annular members 10 and 20.
Since a, 12a, 21a and 22a are formed, the inlet portions 13 and 23 can be spread smoothly when the reinforcing bars 15 and 25 are inserted.

Second Embodiment On the other hand, FIGS. 6 and 7 show a second embodiment of the joint clip. This embodiment differs from the first embodiment in that the annular body 10,
In FIG. 20, only the short piece part is omitted, and the other parts have the same configuration. Similar members in the drawings are designated by the same reference numerals.

The joint clip C of this embodiment can be manufactured and used in the same manner as in the first embodiment. Further, as compared with the joint clip C, the short piece portion is omitted, so that the manufacturing can be performed more easily.

[Third Embodiment] FIG. 8 shows a third embodiment of the joint clip. The present embodiment is different from the above-described second embodiment in that the recesses (reference numerals 16 and 26 in FIG. 4) are clearly shown in the comparison of the developed views, that is, the comparison between FIG. 8A and FIG. The protrusion 10 is omitted and has a function similar to this.
0 (illustrated in FIG. 8) is provided, and the shape of the bent portion 101 is a curved notch instead of the streak notch, and the other configurations are the same. . Similar members in the drawings are designated by the same reference numerals.

The joint clip C of this embodiment can be manufactured and used as in the first and second embodiments. In this case, as shown in FIG. 8B, at the time of assembly, the protruding portion 100 is formed so as to protrude toward the annular body 20 side, for example. Therefore, as shown in FIG. 8C, when the reinforcing bars 15 and 25 are used, the protrusion 100 is
In the illustrated example, the reinforcing bar 25 is located between the nodes 25a, 25a. That is, even when a sliding force is applied to the reinforcing bar 25, the protrusion 100 can lock the joint 25a and prevent the reinforcing bar 25 from slipping.

[Fourth Embodiment] FIG. 9 shows a fourth embodiment of the joint clip. The present embodiment is different from the above-described first embodiment, as is clear from comparison of development views, that is, comparison between FIG. 9 and FIG. 2, this embodiment is formed from two spring steels 110 and 111. The other points have the same configuration. Similar members in the drawings are designated by the same reference numerals.

The two spring steels 110 and 111 are spot-welded or caulked at the substantially center 121 of the overlapping portion 120, with the portion corresponding to the common wall portion 30 as the overlapping portion 120. Are fixed integrally with each other.

The joint clip C of this embodiment can be manufactured and used in the same manner as the first, second and third embodiments. The present embodiment has an advantage that the spring steels 110 and 111 can be easily cut out from the spring steel material because the spring steels 110 and 111 are simple in shape as compared with the first embodiment. doing.

The method for constructing a reinforced concrete skeleton and the joint clip according to the present invention are not limited to the above-mentioned embodiment. Even if the following modifications are made, it does not depart from the gist of the present invention. Absent. a) The axes of the annular bodies 10 and 20 are offset from each other by 90 °
Instead of fixing the two reinforcing bars in a state of being offset by 90 °, fixing the two reinforcing bars in a state of intersecting each other by shifting the axes of the annular bodies by an arbitrary angle. b) Instead of using the one in which the annular bodies 10 and 20 and the common wall portion 30 are integrally molded as the joint clip C, the annular body 10 and the annular body 20 are formed as separate bodies, and these are arranged in a predetermined direction. Use a fixed one. c) Instead of forming the hoop unit 50 into a ring shape as shown in the figure, after forming arbitrarily divided parts individually, combining them into a ring shape. d) Instead of forming the stapling unit 80 in a U shape as shown in the drawing, form arbitrarily divided ones individually and then combine them into a U shape. Alternatively, form a ring. e) Instead of pressing the reinforcing bars 15 and 25 toward the annular bodies 10 and 20 to fix the reinforcing bars 15 and 25 to the joint clip C, the annular bodies 10 and 20 are directed toward the reinforcing bar 1.
Fix it by pressing it toward 5 and 25. f) Instead of incorporating the hoop unit 50 or the stirrup unit 80 into the column main reinforcement 61 or the beam main reinforcement 91 by the ground structure, directly performing the column main reinforcement or the beam main reinforcement arranged at the installation location. g) Instead of the recesses 16 and 26 corresponding to the knots (bamboo knots) 15a and 25a of the illustrated shape, a recess that is recessed according to any knot shape such as a wave node or a screw node is provided. Alternatively, do not form a recess.

[0036]

EFFECTS OF THE INVENTION According to the method for constructing a reinforced concrete frame and the joint clip of the present invention, the following effects are exhibited. According to the method for constructing a reinforced concrete structure according to claim 1, by using a joint clip,
The unidirectional mesh can be manufactured quickly and easily. Therefore, the hoop reinforcement or the stirrup reinforcement can be unitized quickly and easily, and as a result, the reinforced concrete frame can be constructed quickly and easily. Further, by mechanically fixing the reinforcing bars and the connecting reinforcing bars, it can be applied regardless of the type of the reinforcing bars.
According to the joint clip of the second aspect, each rebar is gripped by the expansion / contraction of each inlet of the corresponding annular body. Therefore, the first and second reinforcing bars can be quickly and easily gripped by the first and second annular bodies.
Further, by mechanically fixing the reinforcing bars, the reinforcing bars can be applied regardless of the type of the reinforcing bars. According to the joint clip of claim 3, on the inner surface of each annular body, a recess is formed which is recessed in a direction in which the protrusion is formed in order to engage the protrusion formed on the surface of the reinforcing bar. Therefore, the convex portion of the reinforcing bar surface is locked in the recess of the inner surface of the annular body, and it is possible to prevent the relative movement of each reinforcing bar with respect to the corresponding annular body, and The grip can be performed firmly and reliably.

[Brief description of the drawings]

1A and 1B show a first embodiment of a joint clip of the present invention, in which FIG. 1A is a plan view and FIG. 1B is a front view.

FIG. 2 is a development view of the joint clip shown in FIG.

FIG. 3 shows a manufacturing process of a column reinforcing bar using the joint clip of the present invention, (a) is a unidirectional mesh,
(B) shows a hoop unit, and (c) shows a column rebar.

FIG. 4 shows a manufacturing process of a beam rebar using the joint clip of the present invention, (a) is a unidirectional mesh,
(B) shows a stirrup unit, and (c) shows a beam reinforcing bar.

FIG. 5 shows a construction procedure of a reinforced concrete skeleton using the column and beam reinforcements obtained in FIGS. 3 and 4, respectively. (A) to (d) show each stage of construction in order. .

FIG. 6 shows a second embodiment of the joint clip of the present invention, (a) is a plan view and (b) is a front view.

7 is a development view of the joint clip shown in FIG.

8A and 8B show a third embodiment of the joint clip of the present invention, wherein FIG. 8A is a development view, FIG. 8B is a perspective view corresponding to assembly, and FIG. 8C is a plan view corresponding to use. is there.

FIG. 9 is a development view showing a fourth embodiment of the joint clip of the present invention.

[Explanation of symbols]

 C joint clip 10 annular body (first annular body) 13 inlet portion 15 reinforcing bar (first reinforcing bar) 15a node (convex portion) 16 recess 20 annular body (second annular body) 23 inlet portion 25 reinforcing bar (first portion) 1 rebar) 25a Section (convex) 26 Recess 40 One-way mesh 41 Hoop rebar (reinforcing bar) 42 Connecting rebar 43 Intersection 50 Hoop unit 60 Column rebar 60a Form 61 Column main bar (main bar) 71 Stirrup bar (rebar) ) 72 connecting reinforcing bar 73 crossing 70 unidirectional mesh 80 stapling unit 90 beam reinforcing bar 91 beam main bar (main bar)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshifumi Mizushima 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yukio Matsumoto 20-4 Hiraide Industrial Park, Utsunomiya City, Tochigi Prefecture Within Tadajo Co., Ltd.

Claims (3)

[Claims] 1. A method for constructing a reinforced concrete skeleton, wherein a state in which a first annular body for gripping the reinforcing bar in its own axial direction by expanding and contracting an inlet portion is intersected with the reinforcing bar in advance. Fixed to the first annular body and having an axis that is offset from the axis of the first annular body for fixing the connecting reinforcing bar arranged in the crossed state to the reinforcing bar in the intersecting state. A joint clip including a second annular body for gripping the connecting reinforcing bar in the axial direction of itself by expanding and contracting the part is prepared in advance, and when the reinforced concrete frame is constructed, a plurality of reinforcing bars are After arranging in parallel with each other at a predetermined distance in the direction, the connecting rebars are bridged across the plurality of rebars, and each intersection between these rebars and the connecting rebars is connected to the joy joint. A unidirectional mesh is manufactured by fixing with a clip, and the unidirectional mesh is bent in the length direction to manufacture a hoop unit or a stapling unit, and the hoop unit or stapling unit is fixed to the main rebar. A reinforced concrete skeleton characterized by constructing a reinforced concrete skeleton by producing a column reinforcement or a beam reinforcement, constructing a form around the column reinforcement or the beam reinforcement, and then placing concrete in the form Construction method. 2. A joint clip for fixing two reinforcing bars in a crossed state, the first annular shape for gripping the first reinforcing bar in its own axial direction by expanding and contracting the inlet portion. An axis and an orientation of the first annular body for fixing a body and a second reinforcing bar arranged in a state of intersecting the first reinforcing bar to the first reinforcing bar in the intersecting state. A second for holding the second reinforcing bar in its own axial direction by being fixed to the first annular body with an offset axis and expanding and contracting the inlet part
And a ring-shaped body. 3. The joint clip according to claim 2, wherein the inner surfaces of the first and second annular bodies are arranged in a direction in which the protrusions are formed to engage the protrusions formed on the surface of the reinforcing bar. A joint clip characterized in that a recess is formed in the recess.