JP2020204186A - Bar arrangement method of reinforced concrete - Google Patents

Abstract

To provide a bar arrangement method of a reinforced concrete which can improve efficiency of a transportation work of a deck plate and a binding work of reinforcements, and which can reduce a work cost.SOLUTION: A bar arrangement method of a reinforced concrete comprises the steps of: engaging a second reinforcement engagement portion 48 of a reinforcement binding tool 42 with a bar arrangement structure 25 of a deck plate 22 in a state of being folded on a bottom plate 24; engaging a horizontal reinforcement 50 with a first reinforcement engagement portion 46 of the reinforcement binding tool 42; rotating the bar arrangement structure 25 of the deck plate 22 and raising the bar arrangement structure 25 from a state of folded on the bottom plate 24; and making the bar arrangement structure 25 irrotational by a fixing member of the deck plate 22, to fix a position thereof.SELECTED DRAWING: Figure 6

Description

The present invention relates to a method for arranging reinforced concrete to form a grid-like reinforcing bar arranged inside the concrete in a reinforced concrete structure such as a floor slab in a building structure.

8 to 9 are views to be referred to for explaining a conventional method of arranging reinforced concrete.

In reinforced concrete structures such as floor slabs in building structures such as S and SRC structures, reinforcing bars arranged in a grid pattern in the vertical and horizontal directions are arranged inside the concrete in order to reinforce the tensile strength of the concrete. It was.

Then, conventionally, in order to form a floor slab having such a reinforced concrete structure and to form a grid-like reinforcing bar inside the concrete, a part of the reinforcing bars arranged inside the concrete is previously provided. A deck plate for a floor slab that is fixed, functions as a concrete mold when placing concrete, and becomes a part of the floor slab as it is after the concrete is hardened has been used (for example, Patent Document 1). (See FIG. 1).

As shown in FIG. 8, the conventional deck plate 2 for a floor slab includes a bottom plate 4 and a plurality (two) bar arrangement structures 5 provided on the upper surface side of the bottom plate 4.

As shown in FIG. 8A, the bottom plate 4 of the deck plate 2 is formed in a substantially rectangular plate shape having a predetermined thickness in the vertical direction in the drawing, and is one of the width directions (horizontal direction in the drawing). A connecting male portion 4a was formed at one end, and a connecting female portion 4b was formed at the other end along the length direction of the bottom plate 4 (perpendicular to the paper surface in the figure).

As shown in FIG. 8A, the bar arrangement structure 5 of the deck plate 2 is abbreviated as a round bar-shaped upper chord member 6 extending in the length direction of the bottom plate 4 (direction perpendicular to the paper surface in the figure) and the upper chord member 6. Two lower chord members 7 which are round bar-shaped members extending in parallel and are provided substantially symmetrically in the width direction (left and right direction in the figure) of the bottom plate 4 with the upper chord member 6 sandwiched below the upper chord member 6 in the figure. And, the two lattice members 8 provided in a substantially C shape so as to connect the upper chord member 6 and the two lower chord members 7 were provided.

As shown in FIG. 8B, each of the lattice members 8 of the bar arrangement structure 5 is formed by bending an elongated round bar-shaped member at a plurality of positions in the middle of the length, and the mountain portion 8a and the valley portion 8b are inclined portions. It was formed in a zigzag shape that was alternately continuous via 8c.

Then, as shown in FIG. 8A, the two lattice members 8 are arranged so that the respective mountain portions 8b sandwich the outer peripheral surface of the upper chord member 6 from both the left and right sides in the drawing, and the respective inclined portions 8c. The outer peripheral surfaces of the two lower chord members 7 were arranged so as to come into contact with each other in the middle of the length, and the respective contact portions were fixed by welding or the like. Then, each valley portion 8b of the two lattice members 8 was bent along the upper surface of the bottom plate 4.

A plurality (two) of such bar arrangement structures 5 are provided on the upper surface side of the bottom plate 4, and each bar arrangement structure 5 is a contact portion between each valley portion 8b of the two lattice materials 8 and the upper surface of the bottom plate 4. Was fixed to the upper surface of the bottom plate 4 by joining them by welding or the like.

Such a deck plate 2 is formed by using a material having sufficient strength and corrosion resistance. For example, an upper chord member 6 and a lower chord member 7 formed of steel bars and a lattice material are formed on the upper surface of a bottom plate 4 formed of a steel plate. It was formed by welding a reinforcing bar structure 5 composed of 8.

In order to form a floor slab 1 having a reinforced concrete structure using such a conventional deck plate 2, first, as shown in FIG. 9, a plurality of deck plates 2 are formed according to the size of the floor slab to be formed. Arrange them side by side in the width direction (left and right direction in the figure).

At this time, the connecting male portion 4a of the bottom plate 4 of each deck plate 2 is connected to the connecting female portion 4b of the bottom plate 4 of another deck plate 2 arranged adjacent to this, thereby making one sheet as a whole. A large deck plate is formed.

Then, as shown in FIG. 9, a plurality of arrangements in which the round bar-shaped horizontal stripes 10 extending in the left-right direction in the drawing are provided on the bottom plates 4 of the plurality of deck plates 2 forming the above-mentioned one large deck plate. It is placed on each upper chord member 6 of the streak structure 5 and arranged so as to bridge over these upper chord members 6.

Then, at each intersection where the horizontal bars 10 intersect with the plurality of upper chord members 6, the crossing horizontal bars 10 and the upper chord members 6 are bound by using an elongated iron wire-shaped reinforcing bar binding tool 12, and the horizontal bars 10 bind these upper chord members. Fix it so that it does not move on 6.

In the same manner, a plurality of horizontal streaks 10 are arranged on the upper chord member 6 so as to be arranged substantially parallel to each other at a predetermined distance in the direction perpendicular to the paper surface of the drawing, and each of the horizontal streaks 10 is a plurality of upper chord members. At each intersection that intersects with 6, the crossing horizontal bar 10 and the upper chord member 6 are bound by using an elongated iron wire-shaped reinforcing bar binding tool 12.

As a result, the upper chord member 6 (vertical streaks) and the horizontal streaks 10 are arranged in a grid pattern in the vertical and horizontal directions at positions at predetermined intervals above the upper surface of the bottom plate 4 of the deck plate 2. ..

Then, as shown in FIG. 9, a formwork 14 is provided so as to surround the outer peripheral portion of the one large deck plate, and concrete 16 is placed inside the formwork 14 and the bottom plate 4 of the deck plate 2. The reinforcement structure 5 and the horizontal reinforcement 10 of the deck plate 2 are placed in the portion so as to be arranged inside the concrete 16.

Then, by removing the formwork 14 after the concrete 16 has hardened, the bottom plate 4 of the deck plate 2 becomes the bottom, and the grid-like reinforcing bars composed of the upper chord member 6 (vertical bars) and the horizontal bars 10 are arranged inside the concrete 16. The floor slab 1 was formed, and the deck plate 2 was integrated with the floor slab 1 and used as it was as a part of the floor slab 1.

As described above, in the conventional method of arranging reinforcing bars of reinforced concrete, by using such a deck plate 2 and a reinforcing bar binding tool 12, lattice-shaped reinforcing bars arranged inside the concrete 16 of the floor slab 1 of the reinforced concrete structure are formed. It was supposed to be formed.

Japanese Unexamined Patent Publication No. 2013-163914

However, the conventional reinforced concrete bar arrangement method as described above has a problem that a large number of deck plates cannot be transported at one time, so that the transport efficiency of the deck plates is lowered and the work cost is increased. ..

That is, the conventional deck plate 2 is a member that is relatively light in weight by itself, but its reinforcing bar structure 5 is a three-dimensional structure in which a round bar-shaped member (upper chord member 6, lower chord member 7, lattice member 8) is combined. Because it is formed in a three-dimensional manner, it occupies a large size in the height direction (vertical direction in FIG. 8A), and is a very bulky member.

Therefore, when loading the deck plate 2 onto a truck or the like for carrying it to a construction site, even if the deck plate 2 is stacked in the height direction to the limit of the height dimension that can be loaded on the truck bed or the like, the deck plate 2 is loaded. The total weight of the deck plate 2 is much smaller than the maximum load weight of the truck or the like, and the load weight of the truck or the like is wasted.

Then, when a huge number of deck plates 2 for use at a large-scale construction site are brought into the construction site, the deck plates are used by using a truck or the like in a state where the load weight is wasted as described above. Since the transportation work of 2 is repeated, not only the transportation cost is incurred, but also the loading on trucks and the loading and unloading work at the construction site must be performed each time, so that the transportation efficiency is lowered. As a result, the work cost has increased accordingly.

Further, in the conventional reinforced concrete bar arrangement method as described above, the work of positioning the horizontal bar 10 placed on the upper chord member 6 and the work of binding the intersection of the upper chord member 6 and the horizontal bar 10 are complicated. There was also the problem of reduced efficiency.

That is, in the conventional method of arranging reinforced concrete, when binding the intersection of the upper chord member 6 and the horizontal bar 10, the angle of the horizontal bar 10 placed on the upper chord member 6 with respect to the upper chord member 6 and the adjacent horizontal bar 10 It is necessary to measure the distance from and to position it, and to prepare an instrument for measurement each time, and in some cases, it is necessary to adjust the distance and angle while moving the lateral bar 10. Therefore, the positioning work has become very complicated.

Further, in the method of binding the intersection of the upper chord member 6 and the horizontal bar 10 by using the iron wire-shaped reinforcing bar binding tool 12 as described above, the speed of binding the reinforcing bars and the work quality of the binding portion are the work of the person performing the work. Since it depends on the proficiency level, there is also a problem that it is difficult to speed up and rationalize the work.

Therefore, in view of the above problems, it is an object of the present invention to provide a method for arranging reinforced concrete, which can improve the efficiency of the deck plate transporting work and the reinforcing bar binding work and reduce the working cost. It is a thing.

In order to solve the above problems, the method of arranging reinforced concrete of the present invention
It is provided with a bottom plate, a bar arrangement structure rotatably provided with respect to the upper surface of the bottom plate so as to be foldable on the bottom plate, and a fixing member for making the bar arrangement structure non-rotatable and fixing its position. Deck plate and
It is provided with a connecting portion, a first reinforcing bar locking portion provided on the side surface of the connecting portion, and a second reinforcing bar locking portion provided on the side surface of the connecting portion opposite to the first reinforcing bar locking portion. Using a rebar binding tool
A step of locking the second reinforcing bar locking portion of the reinforcing bar binding tool to the reinforcing bar arrangement structure of the deck plate in a folded state on the bottom plate.
A step of locking the horizontal bar to the first reinforcing bar locking portion of the reinforcing bar binding tool, and
A step of rotating the bar arrangement structure of the deck plate to cause the bar arrangement structure from being folded on the bottom plate.
It is characterized by comprising a step of making the bar arrangement structure non-rotatable and fixing the position by the fixing member of the deck plate.

Moreover, the method of arranging reinforced concrete of the present invention
The bar arrangement structure provided on the bottom plate of the deck plate extends in the length direction of the bottom plate, and is arranged at positions above the upper surface of the bottom plate at predetermined intervals, and the upper chord member. A lower chord member extending substantially in parallel with the upper chord member, arranged along the upper surface of the bottom plate below the upper chord member, and rotatably provided with respect to the upper surface of the bottom plate, and between the upper chord member and the lower chord member. Equipped with a lattice material provided to connect
The second reinforcing bar locking portion of the reinforcing bar binding tool is locked to the upper chord member having the reinforcing bar arrangement structure.

Moreover, the method of arranging reinforced concrete of the present invention
In the reinforcing bar binding tool, a plurality of the first reinforcing bar locking portions are provided on the side surface of the elongated connecting portion along the length direction of the connecting portion, and a plurality of second reinforcing bar locking portions are provided. A side surface of the connecting portion opposite to the first reinforcing bar locking portion is provided along the length direction of the connecting portion.
The reinforcing bar binding tool is arranged so as to bridge over the upper chord member of each of the plurality of the reinforcing bar arrangement structures provided on the bottom plate of the deck plate, and each of the plurality of second reinforcing bar locking portions. Is locked to the upper chord member of each of the plurality of the reinforcing bar arrangement structures.
The horizontal bar is arranged along the length direction of the connecting portion of the reinforcing bar binding tool, and is locked to the first reinforcing bar locking portion of the reinforcing bar binding tool.

According to such a reinforced concrete bar arrangement method of the present invention,
It is provided with a bottom plate, a bar arrangement structure rotatably provided with respect to the upper surface of the bottom plate so as to be foldable on the bottom plate, and a fixing member for making the bar arrangement structure non-rotatable and fixing its position. Deck plate and
It is provided with a connecting portion, a first reinforcing bar locking portion provided on the side surface of the connecting portion, and a second reinforcing bar locking portion provided on the side surface of the connecting portion opposite to the first reinforcing bar locking portion. Using a rebar binding tool
A step of locking the second reinforcing bar locking portion of the reinforcing bar binding tool to the reinforcing bar arrangement structure of the deck plate in a folded state on the bottom plate.
A step of locking the horizontal bar to the first reinforcing bar locking portion of the reinforcing bar binding tool, and
A step of rotating the bar arrangement structure of the deck plate to cause the bar arrangement structure from being folded on the bottom plate.
By providing the step of making the bar arrangement structure non-rotatable and fixing the position by the fixing member of the deck plate.
It is possible to improve the efficiency of the work of transporting the deck plate and the work of binding the reinforcing bars, and reduce the work cost.

It is a figure which shows the deck plate 22 used for the reinforcement arrangement method of the reinforced concrete which concerns on one Embodiment of this invention, FIG. 1A is a front view thereof, and FIG. 1B is a side view thereof. .. It is a figure for demonstrating the procedure of folding the bar arrangement structure 25 of the deck plate 22 shown in FIG. 1, FIG. 2A is a side view of the deck plate 22, and FIG. 2B is a fixing member 30. It is a front view of the omitted deck plate 22. It is a perspective view of the reinforcing bar binder 42 used in the method of arranging the reinforcing bar concrete which concerns on one Embodiment of this invention. It is a figure which shows the reinforcing bar binder 42 shown in FIG. 3, FIG. 4A is a front view thereof, and FIG. 4B is a cross-sectional view taken along the line AA of FIG. 4A. A deck plate 22 in which the fixing member 30 is omitted for explaining a method of arranging reinforced concrete according to an embodiment of the present invention using the deck plate 22 shown in FIG. 1 and the reinforcing bar binding tool 42 shown in FIG. It is a schematic front view. It is a schematic front view of the deck plate 22 which omitted the fixing member 30 for demonstrating the reinforced concrete reinforcement arrangement method which concerns on one Embodiment of this invention. It is a figure for demonstrating the reinforcement arrangement method of the reinforced concrete which concerns on one Embodiment of this invention, FIG. 7A is a schematic side view of the deck plate 22, and FIG. 7B is formed by this invention. It is the schematic sectional drawing of the floor slab 52. It is a figure which shows the conventional deck plate 2 for a floor slab, FIG. 8A is a front view thereof, and FIG. 8B is a side view thereof. It is the schematic sectional drawing for demonstrating the procedure for forming a floor slab 1 using the conventional deck plate 2.

Hereinafter, a mode for carrying out the reinforced concrete bar arrangement method according to the present invention will be specifically described with reference to the drawings.

1 to 7 are views for reference to explain a method of arranging reinforced concrete according to an embodiment of the present invention.

1 and 2 are views to be referred to for explaining the deck plate 22 used in the method of arranging reinforced concrete according to the present embodiment.

As shown in FIG. 1, the deck plate 22 has a bottom plate 24, a plurality of bar arrangement structures 25 provided on the upper surface of the bottom plate 24, and the length direction of the bottom plate 24 of each bar arrangement structure 25 (FIG. 1 (FIG. 1). b) Fixing members 30 provided at both ends in the middle left and right direction) are provided.

As shown in FIG. 1A, the bottom plate 24 of the deck plate 22 has a substantially rectangular plate shape having a predetermined thickness in the vertical direction in the drawing and a predetermined length in the direction perpendicular to the paper surface in the drawing. A connecting male portion 24a is formed at one end (left side in the figure) in the width direction (left-right direction in the figure) perpendicular to the length direction thereof, and a connecting female portion is formed at the other end in the width direction. 24b (see FIG. 5A) are provided along the length direction of the bottom plate 24, respectively.

The connecting male portion 24a and the connecting female portion 24b are formed in a hook shape so that their cross-sectional shapes engage with each other.

As a result, a plurality of deck plates 22 are arranged side by side in the width direction thereof, and the connecting male portion 24a of the bottom plate 24 of each deck plate 22 is arranged adjacent to the connecting male portion 24a of the bottom plate 24 of another deck plate 22. By engaging with the connecting female portion 24b, a plurality of deck plates 22 can be connected in the width direction thereof.

As shown in FIG. 1A, the bar arrangement structure 25 of the deck plate 22 includes a round bar-shaped upper chord member 26 and a lower chord member 27 extending in the length direction of the bottom plate 24 (perpendicular to the paper surface in the drawing). It is provided with a lattice material 28 provided so as to connect the upper chord material 26 and the lower chord material 27.

Then, the upper chord member 26 is arranged at a predetermined interval above the upper surface of the bottom plate 24, and the lower chord member 27 extending substantially parallel to the upper chord member 26 is the lower bottom plate 24 in the drawing of the upper chord member 26. It is arranged along the upper surface.

As shown in FIG. 1B, the lattice material 28 of the bar arrangement structure 25 is formed by bending an elongated round bar-shaped member at a plurality of positions in the middle of the length, and the mountain portion 28a and the valley portion 28b form an inclined portion 28c. It is formed in a zigzag shape that is alternately continuous.

Then, as shown in FIG. 1A, the lattice member 28 has a mountain portion 28b in contact with the outer peripheral surface of the upper chord member 26 on the lower side in the drawing, and a valley portion 28b on the upper side of the lower chord member 27 in the drawing. It is arranged so as to come into contact with the outer peripheral surface, and each contact portion is fixed by welding or the like.

As shown in FIG. 1A, such bar arrangement structures 25 are arranged substantially parallel to each other on the upper surface side of the bottom plate 24 in the width direction of the bottom plate 24 (left-right direction in the figure) at predetermined intervals. Multiple are arranged.

Then, as shown in FIG. 1B, each of the bar arrangement structures 25 is provided in the middle of the lower chord member 27 arranged along the upper surface of the bottom plate 24 in the length direction (left-right direction in the figure). A plurality of bearing members 29 are provided so as to be rotatable around the axis of the lower chord member 27 with respect to the upper surface of the bottom plate 24.

As shown in FIG. 1A, the bearing member 29 has both ends fixed to the upper surface of the bottom plate 24 in the length direction (left-right direction in the drawing) of the elongated plate-shaped member having a predetermined thickness. The central portion of the length is formed by being bent into a cylindrical shape slightly larger than the diameter of the lower chord member 27 so as to be along the outer peripheral surface of the lower chord member 27, and the lower chord member 27 is loosely inserted into the cylindrical shape. There is.

As shown in FIG. 1A, the fixing member 30 of the deck plate 22 is formed in a shape in which a round bar-shaped member having a predetermined length is bent into a substantially C shape that opens downward in the drawing. A support portion 30a extending in the horizontal direction (left-right direction in the figure) is formed in a length portion opposite to the substantially C-shaped opening (upper side in the figure), and the substantially C-shaped opening of the fixing member 30 is formed. Shaft portions 30b extending in the horizontal direction are formed at both ends of the fixing member 20 arranged so as to be sandwiched between them.

Then, as shown in FIG. 1A, the fixing member 30 has a support portion 30a, which is a diagram of each upper chord member 26 of two bar arrangement structures 25 provided on the upper surface of the bottom plate 24 of the deck plate 22. The shaft portion 30b is arranged along the upper surface of the bottom plate 24 in substantially parallel to the width direction (left-right direction in the drawing) of the bottom plate 24 while contacting and supporting the outer peripheral surface in the lower middle.

The fixing member 30 is rotatably provided around the axis of the shaft portion 30b with respect to the upper surface of the bottom plate 24 by the bearing member 31 provided on each shaft portion 30b.

As shown in FIG. 1B, the bearing member 31 has both ends fixed to the upper surface of the bottom plate 24 in the length direction (left-right direction in the drawing) of an elongated plate-shaped member having a predetermined thickness. The central portion of the length is formed by being bent into a cylindrical shape slightly larger than the diameter of the shaft portion 30b so as to be along the outer peripheral surface of the shaft portion 30b of the fixing member 30, and the fixing member 30 is formed inside the cylindrical shape. The shaft portion 30b is loosely inserted.

As shown in FIG. 1 (b), such fixing members 30 are provided at both ends of the bar arrangement structure 25 provided on the upper surface of the bottom plate 24 in the length direction (left-right direction in the figure), respectively. Since the support portion 30a of the fixing member 30 supports both ends of the length of the upper chord member 26 of the bar arrangement structure 25, the bar arrangement structure 25 cannot rotate and its position is fixed. The upper chord member 26 of the 25 is arranged at a predetermined interval above the upper surface of the bottom plate 24.

Such a deck plate 22 is formed by using a material having sufficient strength and corrosion resistance. For example, an upper chord member 26, a lower chord member 27, and a lattice material formed of steel bar on the upper surface of a bottom plate 24 formed of a steel plate. The reinforcing bar structure 25 made of 28 and the fixing member 30 made of steel bar can be formed by being rotatably attached to the bearing members 29 and 31 made of steel plate.

Then, according to such a deck plate 22, as shown in FIG. 2, by folding the bar arrangement structure 25 on the bottom plate 24, the dimension of the deck plate 22 in the height direction can be reduced. It has become.

That is, as shown in FIG. 2A, the fixing member 30 is rotated so that the support portion 30a thereof is separated from the upper chord member 26 of the bar arrangement structure 25, whereby the bar arrangement structure 25 is moved to the lower chord member 27. Since it can be rotated around the axis, as shown in FIG. 2B, the bar arrangement structure 25 provided on the upper surface of the bottom plate 24 is provided so that the upper chord member 26 approaches the bottom plate 24. It can be rotated and folded, and by folding all of the plurality of bar arrangement structures 25 provided on the upper surface of the bottom plate 24, the dimension of the deck plate 22 in the height direction can be reduced.

As a result, when loading the deck plates 22 onto a truck or the like, more deck plates 22 can be stacked in the height direction thereof, so that many deck plates 22 can be loaded and transported on the truck or the like at one time. As a result, the number of times of transportation can be reduced to reduce the transportation cost, and the number of times of loading on trucks and loading and unloading at the construction site can be reduced, so that the efficiency of the entire work can be improved.

3 and 4 are diagrams referred to for explaining the reinforcing bar binding tool 42 used in the method of arranging the reinforcing bars of the reinforced concrete according to the present embodiment.

As shown in FIG. 3, the reinforcing bar binding tool 42 includes an elongated connecting portion 44, a plurality of first reinforcing bar locking portions 46 provided along the side surface of the connecting portion 44, and a first reinforcing bar engagement of the connecting portion 44. A plurality of second reinforcing bar locking portions 48 provided along the side surface opposite to the stop portion 46 are provided.

The connecting portion 44 has a substantially circular cross-sectional shape (see FIG. 4B), and is formed so as to be continuously elongated in the left-right direction in FIG. 4A.

As shown in FIG. 4B, the first reinforcing bar locking portion 46 is formed in a shape in which a round bar-shaped member having a predetermined length is bent into a substantially C shape that opens upward in the drawing. The distance between the substantially C-shaped openings 46b of the 1 reinforcing bar locking portion 46 is formed to be smaller than the diameter of the substantially C-shaped central hole 46a of the first reinforcing bar locking portion 46.

Then, as shown in FIG. 4A, a plurality of first reinforcing bar locking portions 46 are provided on the upper side surface of the connecting portion 44 in the drawing along the length direction (left-right direction in the drawing) of the connecting portion 44. They are provided so as to be lined up at predetermined intervals.

At this time, each of the first reinforcing bar locking portions 46 is arranged so that the axis of the central hole 46a is substantially parallel to the length direction of the connecting portion 44, and the first reinforcing bar locking portion 46 has a substantially C shape. The outer peripheral portion of the portion opposite to the opening 46b is joined to the side surface of the connecting portion 44.

As shown in FIG. 4A, the second reinforcing bar locking portion 48 is substantially the same as the first reinforcing bar locking portion 46, opening a round bar-shaped member having a predetermined length to the lower side in the drawing. It is formed in a shape like a C-shape, and the distance between the substantially C-shaped openings 48b of the second reinforcing bar locking portion 48 is smaller than the diameter of the substantially C-shaped central hole 48a of the second reinforcing bar locking portion 48. It is formed.

Then, as shown in FIG. 4A, a plurality of second reinforcing bar locking portions 48 are provided on the lower side surface of the connecting portion 44 in the drawing along the length direction (left-right direction in the drawing) of the connecting portion 44. They are provided so as to be lined up at predetermined intervals.

At this time, each of the second reinforcing bar locking portions 48 is arranged so that the axis of the central hole 48a is substantially perpendicular to the axis of the central hole 46a of the first reinforcing bar locking portion 46, and the second reinforcing bar is locked. The outer peripheral portion of the portion of the portion 48 opposite to the substantially C-shaped opening 48b is joined to the side surface of the connecting portion 44.

In such a reinforcing bar binding tool 42, the connecting portion 44 is formed of a flexible material such as synthetic resin or metal, whereby the connecting portion 44 is connected in the length direction thereof. Since it can be deformed so as to bend in the vertical direction, a reinforcing bar binding tool 42 having a sufficient length is formed in advance, and the connecting portion 44 is transported and stored in a rolled state. If necessary, the reinforcing bar tying tool 42 having a required length can be pulled out from the above roll and cut out for use.

Further, the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48 of the reinforcing bar binding tool 42 are formed of an elastic material such as synthetic resin or metal, whereby the first reinforcing bar locking portion is formed. The openings 46b and 48b of the 46 and the second reinforcing bar locking portion 48 can be elastically deformed so that the intervals thereof are greatly widened.

As a result, a round bar-shaped reinforcing bar having a diameter substantially the same as the diameter of the central holes 46a and 48a of the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48 is provided by the first reinforcing bar locking portion 46 and the second reinforcing bar engaging portion. By pushing from the openings 46b and 48b of the stop portion 48 into the central holes 46a and 48a, it is possible to lock the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48. ..

When forming a floor slab or the like having a reinforced concrete structure by using such a deck plate 22 or a reinforcing bar binding tool 42, a procedure for forming a grid-like reinforcing bar arranged inside the concrete will be described.

5 to 7 are referred to for explaining a procedure for forming a grid-like reinforcing bar arranged inside the concrete of a floor slab having a reinforced concrete structure by using the reinforced concrete reinforcing bar arrangement method according to the present embodiment. It is a figure.

First, a plurality of deck plates 22 manufactured in a factory or the like are loaded onto a truck or the like with the bar arrangement structure 25 folded on the bottom plate 24 (see FIG. 2B) and transported to the construction site. To do.

Then, as shown in FIG. 5A, the plurality of deck plates 22 carried in are arranged side by side in the width direction (left-right direction in the drawing) according to the size of the floor slab to be formed.

At this time, the connecting male portion 24a of the bottom plate 24 of each deck plate 22 is connected to the connecting female portion 24b of the bottom plate 24 of another deck plate 22 arranged adjacent to this, thereby making one sheet as a whole. A large deck plate is formed.

Then, as shown in FIG. 5A, each of the plurality of deck plates 22 in which the connecting portion 44 of the reinforcing bar binding tool 42 extends in the left-right direction in the drawing to form the one large deck plate. A plurality of reinforcing bar arrangement structures 25 provided on the upper surface of the bottom plate 24 are arranged so as to bridge over each upper chord member 26, and a plurality of the connecting portions 44 are provided along the lower side surface in the drawing. Each of the second reinforcing bar locking portions 48 is locked to the upper chord member 26 of each of the plurality of reinforcing bar arrangement structures 25.

At this time, in the reinforcing bar binding tool 42, a plurality of intervals of the second reinforcing bar locking portions 48 provided along the lower side surface of the connecting portion 44 in the drawing form the above-mentioned one large deck plate. It is formed so as to match the spacing between the upper chord members 26 of the plurality of reinforcing bar arrangement structures 25 provided on the upper surface of each bottom plate 24 of the deck plate 22.

Then, as shown in FIG. 5B, a round bar-shaped horizontal bar 50 extending in the left-right direction in the drawing along the length direction of the connecting portion 44 of the reinforcing bar binding tool 42 is shown in the drawing of the connecting portion 44 of the reinforcing bar binding tool 42. It is locked to the first reinforcing bar locking portion 46 provided along the inner and upper side surfaces.

In the same manner, a plurality of reinforcing bar binding tools 42 are arranged on the upper chord member 26 so as to be arranged substantially parallel to each other at a predetermined distance in the direction perpendicular to the paper surface of FIG. 5 (a). 2 Reinforcing bar locking portions 48 are locked to each upper chord member 26, and a plurality of horizontal reinforcing bars 50 arranged along the length direction of each reinforcing bar binding tool 42 are connected to the first reinforcing bar engaging member of each reinforcing bar binding tool 42. It is locked to the stop portion 46 (see FIG. 6A).

Then, as shown in FIG. 6A, by operating the middle portion of the length of the horizontal bar 50 so as to pull it upward in the figure using a crane or the like (not shown), the horizontal bar 50 is engaged. The stopped reinforcing bar binder 42 and the upper chord member 26 of the reinforcing bar structure 25 locked to the reinforcing bar binding tool 42 are also pulled up, whereby the reinforcing bar binding structure 25 rotates around the axis of the lower chord member 27. It is supposed to be caused from the folded state.

At this time, in the reinforcing bar tying structure 25 and the reinforcing bar tying tool 42, the upper chord member 26 of the reinforcing bar tying structure 25 is not completely fixed to the second reinforcing bar locking portion 48 of the reinforcing bar tying tool 42, and the second reinforcing bar is engaged. Since it is possible to rotate around the axis of the upper chord member 26 inside the central hole 48a of the stop portion 48, the movement of the rebar arrangement structure 25 caused is not restricted.

As a result, as shown in FIG. 6B, a plurality of bar arrangement structures 25 provided on the bottom plates 24 of the plurality of deck plates 22 forming the one large deck plate are placed on the bottom plate 24. It can be triggered at once from the folded state.

Then, as shown in FIG. 7A, the support portion 30a of the fixing member 30 of each deck plate 22 comes into contact with the lower outer peripheral surface of the upper chord member 26 of the bar arrangement structure 25 in the drawing, and the upper chord member 30a By rotating so as to support 26, the position of the bar arrangement structure 25 is fixed, and the upper chord member 26 (vertical bar) and the upper chord member 26 (vertical bar) are placed at positions at predetermined intervals above the upper surface of the bottom plate 24 of the deck plate 22. The horizontal stripes 50 are arranged side by side in a grid pattern.

Then, as shown in FIG. 7B, a formwork 54 is provided so as to surround the outer peripheral portion of the one large deck plate, and the concrete 56 is surrounded by the formwork 54 and the bottom plate 24 of the deck plate 22. The reinforcement structure 25 and the horizontal reinforcement 50 of the deck plate 22 are placed on the inner side of the concrete 56 with a thickness such that they are arranged inside the concrete 56.

Then, by removing the formwork 54 after the concrete 56 has hardened, the bottom plate 24 of the deck plate 22 becomes the bottom, and the grid-like reinforcing bars composed of the upper chord member 26 (vertical bars) and the horizontal bars 50 are arranged inside the concrete 56. The floor slab 52 is formed.

As described above, by using the reinforced concrete reinforcing bar arrangement method according to the embodiment of the present invention, lattice-shaped reinforcing bars arranged inside the concrete of the floor slab of the reinforced concrete structure are formed.

Further, according to the reinforced concrete bar arrangement method according to the present embodiment, the efficiency of the transportation work can be improved by using the deck plate 22 capable of folding the bar arrangement structure 25 on the bottom plate 24.

Further, according to the reinforced concrete bar arrangement method according to the present embodiment, the efficiency of the positioning work of the horizontal bar 50 and the binding work of the intersection of the upper chord member 26 and the horizontal bar 50 is improved by using the reinforcing bar binding tool 42. be able to.

That is, since the position of the reinforcing bar binding tool 42 attached to the upper chord member 26 of the reinforcing bar arrangement structure 25 of the deck plate 22 is the position where the horizontal reinforcing bar 50 is arranged as it is, the horizontal reinforcing bar is a part of a series of operations for binding the intersections of the reinforcing bars. Since the positioning of 50 can be performed and it is not necessary to move the horizontal bar 50 for positioning, the positioning work can be performed efficiently.

Further, the reinforcing bar binding tool 42 pushes the round bar-shaped reinforcing bars (upper chord member 26 and horizontal reinforcing bar 50) into the central holes 46a and 48a of the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 46 to lock them. Therefore, no special tools or skills are required for the work, and even an inexperienced person can easily and quickly bind the intersecting reinforcing bars.

Then, according to the reinforced concrete bar arrangement method according to the present embodiment, by using the deck plate 22 and the reinforcing bar binding tool 42, a plurality of bar arrangement structures 25 provided on the bottom plates 24 of the plurality of deck plates 22 are provided. Can be triggered at once from the folded state on the bottom plate 24.

As described above, according to the reinforced concrete bar arrangement method according to the embodiment of the present invention, it is possible to improve the efficiency of the deck plate transporting work and the reinforcing bar bundling work and reduce the work cost.

The present invention is not limited to the above-described embodiment, and various modifications can be made as long as the object of the present invention can be achieved.

For example, in the deck plate 22 used in the method of arranging reinforced concrete according to the embodiment, the bottom plate 24 is formed in a flat plate shape. For example, in order to reinforce the bottom plate 24, the upper surface of the bottom plate 24 is formed. Ribs may be formed on the lower surface or the lower surface, or the bottom plate 24 itself may be formed in a corrugated shape.

Further, in the deck plate 22 used in the reinforced concrete bar arrangement method according to the embodiment, the lattice material 28 of the bar arrangement structure 25 is formed by bending one elongated round bar-shaped member in a zigzag shape. Any other shape may be used as long as it connects between the upper chord member 26 and the lower chord member 27, and the lattice member 28 may be composed of a plurality of members.

Further, in the deck plate 22 used in the reinforced concrete bar arrangement method according to the embodiment, the bar arrangement structure 25 is configured to include an upper chord member 26 and a lower chord member 27 extending substantially parallel to each other. The structure may be such that one or a plurality of reinforcing bars (middle chord members) extending substantially parallel to these are arranged between the upper chord member 26 and the lower chord member 27.

Further, in the reinforcing bar binding tool 42 used in the method of arranging the reinforcing bar concrete according to the embodiment, the connecting portion 44 is formed of a flexible material, but in addition, the connecting portion 44 is formed. Because the material used for this purpose has elasticity, the reinforcing bar binding tool 42 may be formed so as to expand and contract in the length direction of the connecting portion 44.

Further, in the reinforcing bar binding tool 42 used in the reinforcing bar arranging method according to the embodiment, the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48 are substantially the same in the length direction of the connecting portion 44. However, the position of the first reinforcing bar locking portion 46 does not have to be provided so as to coincide with the position of the second reinforcing bar locking portion 48. For example, the first reinforcing bar locking portion 46 is provided. However, the two second reinforcing bar locking portions 48 may be provided substantially in the middle, and the plurality of first reinforcing bar locking portions 46 may not be provided at regular intervals.

Further, in the reinforcing bar binding tool 42 used in the reinforcing bar arranging method according to the embodiment, the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48 bend a round bar-shaped member into a substantially C shape. However, the shape of the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48 may be any shape as long as the reinforcing bars can be locked and fixed.

Further, in the reinforcing bar binding tool 42 used in the reinforcing bar arranging method according to the embodiment, the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48 may be integrally molded with the connecting portion 44. However, the first reinforcing bar locking portion 46 and the second reinforcing bar locking portion 48, which are individually formed, may be later joined to the connecting portion 44 by adhesion or welding.

Further, in the reinforced concrete reinforcement method according to the embodiment, as shown in FIGS. 6A and 6B, the horizontal reinforcement 50 is pulled upward to cause the reinforcement structure 25, but other than the horizontal reinforcement 50. The upper chord member 26 and the reinforcing bar binding tool 42 may be pulled up, or a plurality of the above members may be pulled up at the same time.

Further, the method of arranging reinforced concrete according to the embodiment is not only used when forming the floor slab 52 of the building structure as shown in FIG. 7B, but also such as a wall material and a pillar material. It may be used when forming other reinforced concrete structures.

1 Floor slab 2 Deck plate 4 Bottom plate 4a Connecting male part 4b Connecting female part 5 Reinforcing bar structure 6 Upper chord material 7 Lower chord material 8 Lattice material 8a Mountain part 8b Valley part 8c Inclined part 10 Horizontal bar 12 Reinforcing bar binding tool 14 Formwork 16 Concrete 22 Deck plate 24 Bottom plate 24a Connecting male part 24b Connecting female part 25 Reinforcing bar structure 26 Upper chord material 27 Lower chord material 28 Lattice material 28a Mountain part 28b Valley part 28c Inclined part 29 Bearing member 30 Fixing member 30a Support part 30b Shaft part 31 Bearing member 42 Reinforcing bar binder 44 Connecting part 46 1st rebar locking part 46a Central hole 46b Opening 48 2nd rebar locking part 48a Central hole 48b Opening 50 Horizontal bar 52 Floor slab 54 Formwork 56 Concrete

Claims (3)

It is provided with a bottom plate, a bar arrangement structure rotatably provided with respect to the upper surface of the bottom plate so as to be foldable on the bottom plate, and a fixing member for making the bar arrangement structure non-rotatable and fixing its position. Deck plate and
It is provided with a connecting portion, a first reinforcing bar locking portion provided on the side surface of the connecting portion, and a second reinforcing bar locking portion provided on the side surface of the connecting portion opposite to the first reinforcing bar locking portion. Using a rebar binding tool
A step of locking the second reinforcing bar locking portion of the reinforcing bar binding tool to the reinforcing bar arrangement structure of the deck plate in a folded state on the bottom plate.
A step of locking the horizontal bar to the first reinforcing bar locking portion of the reinforcing bar binding tool, and
A step of rotating the bar arrangement structure of the deck plate to cause the bar arrangement structure from being folded on the bottom plate.
A method for arranging reinforced concrete, which comprises a step of making the reinforcing bar structure non-rotatable by the fixing member of the deck plate and fixing the position thereof. The bar arrangement structure provided on the bottom plate of the deck plate extends in the length direction of the bottom plate, and is arranged at positions above the upper surface of the bottom plate at predetermined intervals, and the upper chord member. A lower chord member extending substantially in parallel with the upper chord member, arranged along the upper surface of the bottom plate below the upper chord member, and rotatably provided with respect to the upper surface of the bottom plate, and between the upper chord member and the lower chord member. Equipped with a lattice material provided to connect
The method for arranging reinforcing bars in reinforced concrete according to claim 1, wherein the second reinforcing bar locking portion of the reinforcing bar binding tool is locked to the upper chord member having the reinforcing bar arrangement structure. In the reinforcing bar binding tool, a plurality of the first reinforcing bar locking portions are provided on the side surface of the elongated connecting portion along the length direction of the connecting portion, and a plurality of second reinforcing bar locking portions are provided. A side surface of the connecting portion opposite to the first reinforcing bar locking portion is provided along the length direction of the connecting portion.
The reinforcing bar binding tool is arranged so as to bridge over the upper chord member of each of the plurality of the reinforcing bar arrangement structures provided on the bottom plate of the deck plate, and each of the plurality of second reinforcing bar locking portions is provided. Is locked to the upper chord member of each of the plurality of the reinforcing bar arrangement structures.
2. The second aspect of the present invention, wherein the horizontal bar is arranged along the length direction of the connecting portion of the reinforcing bar binding tool and is locked to the first reinforcing bar locking portion of the reinforcing bar binding tool. Reinforcing bar concrete reinforcement method.

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