JP2021121719A - Reinforcement truss and deck panel - Google Patents

Abstract

To provide a reinforcement truss and a deck panel which can reduce the weight, improve the efficiency of the concrete filling work, and suppress the bulkiness in the transportation.SOLUTION: A reinforcement truss 2 comprises: a linear first main reinforcement 10; a linear second main reinforcement 20 which is apart on the lower side of the first main reinforcement 10 and located along the first main reinforcement 10; and a pair of wave-shaped lattice material 30 in which a first inflection part 31 and a second inflection part 32 are repeated in the longitudinal direction. The pair of lattice materials 30 faces each other so as to sandwich the first main reinforcement 10 and the second main reinforcement 20 from both sides in the width direction intersecting the direction where the first main reinforcement 10 and the second main reinforcement 20 extend. Each first inflection part 31 of the one lattice material 30 and each first inflection part 31 of the other lattice material 30 face each other. The pair of lattice materials 30 includes a first joint portion 33 in a portion where the first main reinforcement 10 and the pair of lattice materials 30 contact each other, and a second joint portion 34 in a portion where the second main reinforcement 20 and an intermediate portion between each first inflection part 31 and each second inflection part 32 contact each other.SELECTED DRAWING: Figure 5

Description

The present invention relates to rebar trusses and deck panels.

Conventionally, when constructing the ceiling or floor of a reinforced concrete structure, a construction method using a reinforcing bar and a deck unit has been adopted. As a unit of the reinforcing bar and the deck, there is a structural material in which a reinforcing bar truss having a plurality of main bars and a lattice bar is fixed to the bottom plate deck by welding or the like, and the main bar and the bottom plate deck of the reinforced concrete slab are integrated.

For example, Patent Document 1 discloses a reinforcing bar truss having one upper main bar, two lower main bars, and two wavy lattice members that repeat peaks and valleys in the length direction. There is. In this reinforcing bar truss, the upper main bar and the top of each mountain portion of the two lattice lumbers are joined. Further, in each lattice material, one lower main bar is joined to one lattice material at each valley portion of the lattice material. Since the two lower main bars are separated from each other in the direction intersecting the length direction, the two lattice members are configured to spread outward from each other. Further, the tips of the valleys of the lattice lumber are joined to the bottom plate, and the reinforcing bar truss and the bottom plate are integrated.

Japanese Unexamined Patent Publication No. 10-196027

However, the reinforcing bar truss disclosed in Patent Document 1 tends to increase in weight because the number of main bars including the upper main bar and the lower main bar is three. In addition, there are many intersections between the main bar and the lattice lumber in a plan view, which tends to hinder the filling of concrete. Further, it is easy to be bulky when transporting a reinforcing bar truss or a deck panel in which the reinforcing bar truss and the bottom plate are integrated.

The present invention has been devised in view of these points, and the problems to be solved by the present invention are to reduce the weight, improve the work efficiency in filling concrete, and suppress the bulkiness during transportation. The purpose is to provide reinforced trusses and deck panels that can be used.

In order to solve the above problems, the present invention takes the following means. First, the first invention comprises a linear first main bar, a linear second main bar separated below the first main bar and located along the first main bar, and a first main bar in the length direction. It has a pair of wavy lattice members that repeat one inflection point and a second inflection point, and the pair of lattice members includes the first main bar and the second main bar, and the first main bar and the first main bar. The two main bars face each other so as to be sandwiched from both sides in the width direction intersecting with the extending direction, so that the first inflection point of each lattice material and the first inflection point of each lattice material of the other lattice material face each other. Each of the first inflection points in the second main bar and the pair of lattice materials has a first joint portion set at a portion where the first main bar and the pair of lattice materials are in contact with each other. A reinforcing bar truss in which a portion and an intermediate portion of each second inflection point each have a second joint portion set at a contact portion.

Since the reinforcing bar truss of the first invention has two main bars, the number of main bars can be reduced, so that the weight can be reduced. Further, in the plan view of the reinforcing bar truss, the intersecting portion of the main bar and the lattice material is reduced as compared with the conventional example. Further, by adopting a configuration in which a pair of lattice lumbers are arranged so as to sandwich the first main bar and the second main bar, the width of the reinforcing bar truss can be narrowed as compared with the conventional example, and the spread in the width direction can be suppressed. .. Therefore, it becomes easier to pour concrete into the reinforcing bar truss, and the efficiency of concrete filling work can be improved. Further, since a plurality of reinforcing bar trusses can be easily stacked, it is possible to suppress bulkiness during transportation.

The second invention is the reinforcing bar truss according to the first invention, wherein the pair of lattice materials has a first inflection point between each of the second joint portions and each of the second inflection points. At the first inflection point, the inflection is made so as to have a spread in the width direction.

According to the second invention, since each second inflection point of the pair of lattice lumbers spreads outward in the width direction, the reinforcing bar truss can be supported in a wider area, and the reinforcing bar truss becomes stable and self-supporting. Therefore, the rigidity and strength of the reinforcing bar truss can be improved, and the stability can be improved.

The third invention is the reinforcing bar truss according to the first or second invention, in which the pair of lattice materials have a second inflection point between each of the second joint portions and each of the second inflection points. Each has a leg portion that is bent so that each of the second inflection points of the one lattice material and each of the second inflection points of the other lattice material are separated from each other at the second inflection point. Each has.

According to the third invention, since the pair of lattice lumbers are bent on each second inflection point side to form the legs, the reinforcing bar truss can be supported by the respective legs. Therefore, the reinforcing bar truss can be more stable and self-supporting, and the rigidity and stability can be improved.

The fourth invention is the reinforcing bar truss in any one of the first to third inventions, and the pair of lattice materials have the same amplitude and the same pitch, respectively, of the first inflection point and the second inflection point. It is a wave shape that repeats each other.

According to the fourth invention, since the amplitude and pitch of the first inflection point and the second inflection point of the pair of lattice lumbers are constant, the lattice lumber is bent and joined to the first main bar and the second main bar. It becomes easier to perform the above, and the manufacturing process of the reinforcing bar truss can be shortened.

The fifth invention has a reinforcing bar truss according to any one of the first to fourth inventions and a metal plate member, and each of the second inflection points and the plate member are joined and integrated. There is a deck panel.

According to the fifth invention, a strong deck panel in which the reinforcing bar truss and the plate member are integrated can be formed.

The present invention can provide a reinforcing bar truss and a deck panel capable of reducing the weight, improving the work efficiency of concrete filling, and suppressing bulkiness during transportation by having the configurations of the above inventions.

It is a perspective view of the reinforcing bar truss and the deck panel which concerns on Embodiment 1. FIG. It is the II direction arrow view of FIG. FIG. 2 is a view taken along the line III in FIG. FIG. 2 is a view taken along the line IV in FIG. It is a perspective view of the reinforcing bar truss and the deck panel which concerns on Embodiment 2. FIG. It is a VI direction arrow view of FIG. It is a VII direction arrow view of FIG. It is the VIII direction arrow view of FIG. It is a figure which shows the modification 1 of this Embodiment 1 and this Embodiment 2. It is a figure which shows the modification 2 of this Embodiment 1 and this Embodiment 2.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 10. The reinforcing bar truss 2 and the deck panel 1 according to the embodiment of the present invention are used for construction work such as a concrete floor slab. At the construction site, concrete is poured after the deck panel 1 in which the reinforcing bar truss 2 and the plate member 40 are integrally formed is laid side by side. FIG. 1 is a perspective view of the reinforcing bar truss 2 and the deck panel 1 according to the first embodiment. The reinforcing bar truss 2 is joined to the plate member 40 and integrally constitutes the deck panel 1. The size of the reinforcing bar truss 2 and the deck panel 1 is set according to the area and thickness of the floor slab or the like. In addition, the number of reinforcing bar trusses 2 installed and the spacing between the arrangements are also appropriately set.

As shown in FIGS. 1 to 4, the reinforcing bar truss 2 of the first embodiment has a linear first main bar 10 and a second main bar 20, and a pair of wavy lattice members 30.

The first main bar 10 and the second main bar 20 are formed by linearly stretching an iron material in the axial direction. For example, deformed reinforcing bars may be used. The first main bar 10 and the second main bar 20 are separated from each other in the vertical direction, and the second main bar 20 is located on the lower side along the first main bar 10. The first main bar 10 and the second main bar 20 are preferably parallel to each other. As the reinforcing bars used for the two main reinforcing bars, reinforcing bars having the same diameter may be used for the first main reinforcing bar 10 and the second main reinforcing bar 20, or reinforcing bars having different diameters may be used. Further, the height positions of the first main bar 10 and the second main bar 20 can be appropriately set according to the size of the reinforcing bar truss 2. Further, the first main bar 10 and the second main bar 20 are not limited to a linear shape, and may be processed into another shape such as an arc shape depending on the design of the floor slab.

The pair of lattice materials 30 are formed by bending a linear metal material so as to have a wavy shape in the length direction. For example, an iron wire may be used. The lattice material 30 repeats the first inflection point 31 and the second inflection point 32 in the length direction, and the inclined portion 38, that is, diagonally upward between the first inflection point 31 and the second inflection point 32. It has an upwardly inclined portion 38U extending diagonally downward and a downwardly inclined portion 38D extending diagonally downward.

Specifically, in the length direction, the lattice material 30 extending in a straight line diagonally upward is bent in a diagonally downward direction. The curved portion of the lattice material 30 bent diagonally from upward to diagonally downward is the first inflection point 31. Further, the lattice material 30 extending in a straight line diagonally downward is bent in a diagonally upward direction. The curved portion of the lattice material 30 bent from diagonally downward to diagonally upward is the second inflection point 32. Further, in the length direction, the portion extending diagonally upward from the second inflection point 32 toward the first inflection point 31 becomes the upward inclined portion 38U, and the portion extending from the first inflection point 31 to the second inflection point 32. The portion extending diagonally downward is the downward inclined portion 38D.

In other words, in the lattice material 30, the upward inclined portion 38U extends toward the first inflection point 31 in the length direction, and the first inflection point 31 is bent obliquely downward. Then, the downwardly inclined portion 38D extends toward the second inflection point 32, and is bent diagonally upward at the second inflection point 32.

The lattice material 30 is a pair of one lattice material 30a and the other lattice material 30b. These lumbers 30a and 30b are arranged so as to sandwich the first main bar 10 and the second main bar 20 from both sides in the width direction intersecting the extending direction of the first main bar 10 and the second main bar 20. ing.

As shown in FIGS. 2 to 4, each first variable portion 31a of one lattice material 30a and each first variable portion 31b of the other lattice material 30b face each other, and each second of one lattice material 30a. The bending portion 32a and the second bending portion 32b of the other lattice material 30b are arranged so as to face each other. The lattice material 30 has a configuration in which the first inflection point 31 and the second inflection point 32 are repeated at the same amplitude and pitch. Therefore, the angle θ1 of the first inflection point 31 and the angle θ2 of the second inflection point 32 are constant.

In other words, the lattice material 30 has wavy peaks and valleys, and the peaks and valleys are repeated in the length direction with the same amplitude and the same pitch. Then, in the view from the width direction shown in FIG. 3, each mountain portion of one lattice material 30a and each mountain portion of the other lattice material 30b overlap each other, and each valley portion of one lattice material 30a and the other lattice portion. The valleys of the lumber 30b are arranged so as to overlap each other.

The lattice lumber 30 has a first joint portion 33 and a second joint portion 34. The first joint portion 33 is set at a portion where the upper outer peripheral surface of the first main bar 10 and the apex portion of the first inflection portion 31 of the lattice lumber 30 are in contact with each other. The second joint portion 34 is set at a portion where the second main bar 20 and the intermediate portion between the first inflection point 31 and the second inflection point 32 of the lattice lumber 30 are in contact with each other. The first main bar 10 and the lattice material 30 are joined by welding at each first joint portion 33, and the second main bar 20 and the lattice material 30 are joined by welding at each second joint portion 34. The positions of the first joint portion 33 and the second joint portion 34 can be arbitrarily set.

The lattice material 30 has a second inflection point 36 arbitrarily set between each second joint portion 34 and each second inflection point 32. It also has legs 37 that are bent at the second inflection point 36. Specifically, at the second inflection point 36, the lattice material 30a, so that each second inflection point 32a of one lattice material 30a and each second inflection point 32b of the other lattice material 30b are separated from each other. 30b is bent, and the leg portion 37 is formed on the second inflection portion 32 side of the inclined portion 38. In other words, the pair of lattice lumbers 30 are bent at the second inflection point 36 so as to be horizontal to the outside in the width direction. Therefore, the bending angle θ6 of the lattice material 30 at the second inflection point 36 is set so that the legs 37 are horizontal. The legs 37 are from the second inflection point 36 to the second inflection point 32.

The plate member 40 is a metal plate, and for example, a hot-dip galvanized steel plate may be used. Ribs 41 are formed on the surface of the plate member 40 according to the installation position of the reinforcing bar truss 2. The rib 41 is formed so that the surface of the plate member 40 projects upward in a convex shape, and extends linearly along the length direction of the plate member 40. The legs 37 of the lattice material 30 are joined to the ribs 41 by welding. In this way, the reinforcing bar truss 2 and the plate member 40 are joined to form the deck panel 1 together. The cross-sectional shape of the rib 41 may be processed into various shapes such as a semicircle or a trapezoid. Further, the flat plate member 40 may be used without providing the rib 41.

Next, the functions and operations of the reinforcing bar truss 2 and the deck panel 1 in the first embodiment will be described. The reinforcing bar truss 2 of the first embodiment has a configuration in which the number of main reinforcing bars is two. Since the reinforcing bars have a certain length, the weight of the reinforcing bar truss 2 can be significantly reduced by reducing the number of main reinforcing bars from three to two. In addition, the amount of constituent members used can be suppressed.

Further, the reinforcing bar truss 2 in the first embodiment has a configuration in which a pair of lattice lumbers 30a and 30b are arranged so as to sandwich the first main bar 10 and the second main bar 20 from both sides in the width direction. By adopting this configuration, the first main bar 10 and the second main bar 20 can be uniformly held from the left and right in the width direction. Further, the inclination of the reinforcing bar truss 2 to the left and right can be suppressed. Therefore, even when concrete is placed, it becomes easy to maintain a state in which the first main bar 10 and the second main bar 20 are parallel to each other. Further, the deformation of the constituent members can be suppressed, and the rigidity of the reinforcing bar truss 2 can be improved.

Further, by arranging the pair of lattice members 30 so as to sandwich the two main bars from both sides in the width direction, it is possible to form the reinforcing bar truss 2 having a shorter length in the width direction as compared with the conventional example. With reference to FIG. 2, the width of the reinforcing bar truss 2 above the second inflection point 36 is the length obtained by combining the diameter of the first main bar 10 or the second main bar 20 with the diameters of the two lattice members 30a and 30b. Yes, the gap formed between each component is smaller than that of the conventional example. Therefore, it becomes easy to stack a plurality of reinforcing bar trusses 2 that are turned upside down, and it is possible to suppress bulkiness during transportation and save space.

With reference to FIG. 2, the width of the reinforcing bar truss 2 can be made narrower than that of the conventional example. With reference to FIG. 4, in a plan view, the portions where the members of the first main bar 10, the second main bar 20, and the lattice lumber 30 intersect with each other are reduced as compared with the conventional example. By adopting a configuration in which the constituent members are arranged without being crowded in this way, it becomes easier to pour concrete at the time of placing concrete, and the work process can be shortened.

With reference to FIGS. 2 to 4, each of the first inflection points 31a of the one lattice material 30a and each first inflection point 31b of the other lattice material 30b face each other, so that the pair of lattice materials 30 The first inflection points 31a and 31b overlap each other when viewed from the width direction. Further, each first joint portion 33a of one lattice material 30a and each first joint portion 33b of the other lattice material 30b overlap each other when viewed from the width direction. Therefore, at each of the first joint portions 33a and 33b, the welding work of the first main bar 10 and the pair of lattice lumbers 30a and 30b can be performed at once, and the welding points can be reduced.

Further, since the lattice lumbers 30a and 30b are joined to these main bars without straddling the first main bar 10 and the second main bar 20, respectively, the diameters of the first main bar 10, the second main bar 20, and the lattice material 30 can be changed. There is a high degree of freedom when making a selection.

Further, since the lattice material 30 has the leg portion 37 on the second inflection portion 32 side of the inclined portion 38, the leg portion 37 of the lattice material 30 can support the reinforcing bar truss 2. Further, the area where the reinforcing bar truss 2 comes into contact with the plate member 40 becomes wider. Therefore, the reinforcing bar truss 2 can be stably self-supporting and the rigidity can be improved.

Further, the lattice material 30 has a configuration in which the first inflection point 31 and the second inflection point 32 are repeated with each other at the same amplitude and the same pitch. Therefore, by joining the tops of the first inflection points 31 of the first main bar 10 and the lattice material 30, the first main bar 10 is held in a straight line. In other words, in the lattice lumber 30, the first joint portions 33 are set so as to line up in a straight line. By arranging the second main bar 20 in parallel along the first main bar 10, the second joint portion 34 is set to be aligned on a straight line. Further, since the amplitude and the pitch are constant, it is possible to efficiently perform the bending process of the lattice material 30 and the joining work with the main bar.

Since the reinforcing bar truss 2 of the first embodiment can be improved in rigidity and strength by the above configuration, function, and action, the number of main reinforcing bars can be reduced to two. Therefore, the weight of the reinforcing bar truss 2 can be reduced while maintaining a constant rigidity and strength.

The reinforcing bar truss 2 and the deck panel 1 in the above embodiment 1 have the following effects. Since the reinforcing bar truss 2 has two main bars, the number of main bars can be reduced, so that the weight can be reduced. Further, referring to FIG. 4, in the plan view of the reinforcing bar truss 2, the intersecting portions of the first main bar 10, the second main bar 20, and the lattice material 30 are reduced as compared with the conventional example. Further, by adopting a configuration in which the pair of lattice members 30 are arranged so as to sandwich the first main bar 10 and the second main bar 20, the width of the reinforcing bar truss 2 can be narrowed as compared with the conventional example, and the width in the width direction can be reduced. Spread is suppressed. Therefore, it becomes easy to pour concrete into the reinforcing bar truss 2, and the efficiency of the concrete filling work can be improved. Further, since the plurality of reinforcing bar trusses 2 can be easily stacked, it is possible to suppress the bulkiness during transportation.

In the reinforcing bar truss 2, since the lattice material 30 is bent on each second inflection point 32 side to form the leg portion 37, the reinforcing bar truss 2 can be supported by the leg portion 37 of the lattice material 30. Therefore, the reinforcing bar truss 2 can be more stable and self-supporting, and the rigidity and stability can be improved. Further, the area of the lattice material 30 in contact with the plate member 40 on the side of each second inflection point 32 becomes wider, and the stability when the reinforcing bar truss 2 is joined to the plate member 40 can be improved. The lattice material 30 has a wave shape in which the first inflection point 31 and the second inflection point 32 are repeated at the same amplitude and pitch. As a result, the amplitude and pitch of the first inflection point 31 and the second inflection point 32 of the lattice material 30 become constant, so that the lattice material 30 can be bent and joined to the first main bar 10 and the second main bar 20. This makes it easier to perform, and the manufacturing process of the reinforcing bar truss 2 can be shortened. Further, a strong deck panel 1 in which the reinforcing bar truss 2 and the plate member 40 are integrated can be formed.

By joining the reinforcing bar truss 2 and the plate member 40 in the first embodiment, the deck panel 1 capable of maintaining a constant rigidity and strength is configured. Therefore, it is possible to provide a strong reinforcing bar truss and deck panel while improving work efficiency and cost reduction in the manufacturing process and further reducing the weight.

Since the reinforcing bar truss 2 has a configuration in which a pair of lattice lumbers 30 sandwich the two main bars from both sides in the width direction, the stability and rigidity of the reinforcing bar truss 2 can be improved. Further, since the width of the reinforcing bar truss 2 is narrower than that of the conventional example and the number of intersecting portions of the constituent members in the plan view is small, it is easy to pour concrete and the work efficiency can be improved. Further, by suppressing the spread in the width direction, it is possible to easily stack the plurality of reinforcing bar trusses 2. Therefore, the bulkiness of the reinforcing bar truss 2 or the deck panel 1 in which the reinforcing bar truss 2 and the plate member 40 are integrated can be suppressed, and space can be saved.

Further, since each of the first inflection points 31a of the one lattice material 30a and each first inflection point 31b of the other lattice material 30b face each other, the first main bar 10 and the pair of lattice materials 30a and 30b Welding points overlap. Therefore, the number of welding points can be reduced as a whole, and the work process can be shortened. Further, the reinforcing bar truss 2 can be reduced in weight and cost by reducing the amount of constituent members used. In addition, the work process can be shortened by making it easy to pour concrete.

Further, the amplitude and pitch of each peak and each valley of the lattice material 30 are set to be constant, so that the first joint portion 33 and the second joint portion 34 are arranged in a straight line, respectively. Therefore, the bending work of the lattice material 30 and the joining work with the main bar can be efficiently performed, and the work process can be shortened. Further, the reinforcing bar truss 2 is stable and self-supporting because the lattice material 30 has the leg portion 37 on the second inflection portion 32 side of the inclined portion 38. With this configuration, it is possible to improve the stability of the reinforcing bar truss 2 when joining the plate member 40 and when placing concrete.

Further, since the lattice lumbers 30a and 30b are arranged so as to be sandwiched from both sides in the width direction without straddling the first main bar 10 and the second main bar 20, the first main bar 10 and the second main bar 20 are joined. , When selecting the diameter of the lattice material 30, the degree of freedom is increased. Therefore, it is possible to provide the reinforcing bar truss 2 of various sizes or heights. Further, the first main bar 10 and the second main bar 20 are uniformly held and deformation is suppressed, so that the stability and rigidity of the reinforcing bar truss 2 can be improved.

Next, the reinforcing bar truss 2 and the deck panel 1 according to the second embodiment will be described. In addition, about the part which has the same substantial structure, action effect, etc. as the reinforcing bar truss 2 and the deck panel 1 described in Embodiment 1, the same reference numerals are given and the description is omitted, and the different part will be described in detail. I will explain it.

As shown in FIGS. 5 to 8, the reinforcing bar truss 2 of the second embodiment has a linear first main bar 10 and a linear second main bar 20 located on the lower side of the first main bar 10 in the length direction. It has a pair of wavy lattice members 30 that repeat the first bending portion 31 and the second bending portion 32 with each other. The first main bar 10, the second main bar 20, and the pair of lattice lumbers 30 have the same arrangement as that of the first embodiment.

With reference to FIG. 6, reinforcing bars having different diameters are used for the first main bar 10 and the second main bar 20. The diameter of the first main bar 10 is larger than the diameter of the second main bar 20.

As shown in FIG. 6, the lattice materials 30a and 30b have the first inflection point 35 and the second inflection point arbitrarily set between the second inflection point 34 and the second inflection points 32a and 32b. Each has a point 36. In the second embodiment, the first inflection point 35 is set at the same height position as the second joint portion 34. The second inflection point 36 is set below the first inflection point 35.

At the first inflection point 35, the lattice lumber 30 is bent so as to have an spread in the width direction, and is expanded. In other words, the lattice materials 30a and 30b are bent so that the second inflection points 32a of the one lattice material 30a and the second inflection points 32b of the other lattice material 30b are separated from each other. The separation distance L1 in the width direction of the second inflection points 32a and 32b facing each other across the first main bar 10 and the second main bar 20 can be arbitrarily set, and the lattice materials 30a and 30b have a predetermined width. It is widened according to the separation distance L1 in the direction.

At the second bending point 36, the lattice materials 30a and 30b are bent so that the second inflection points 32a of one lattice material 30a and the second inflection points 32b of the other lattice material 30b are separated from each other. , Legs 37 are formed respectively. In other words, the lattice lumbers 30a and 30b are respectively bent horizontally outward in the width direction to form the leg portion 37.

The angle θ5 of the expansion of the lattice material 30 at the first inflection point 35 and the angle θ6 of the lattice material 30 at the second inflection point 36 are set so that the legs 37 are horizontal.

The reinforcing bar truss 2 and the deck panel 1 in the second embodiment have a configuration in which the lattice lumbers 30a and 30b are bent and expanded so as to have an spread in the width direction at each first inflection point 35. As a result, a truss is formed below the second main bar 20 by the plate member 40 and the inclined portions 38 of the lattice members 30a and 30b. Therefore, the first main bar 10 and the second main bar 20 are supported by more trusses.

The reinforcing bar truss 2 and the deck panel 1 in the second embodiment have the following effects in addition to the effects in the first embodiment. In the reinforcing bar truss 2, since the second inflection points 32 of the pair of lattice trusses 30 spread outward in the width direction, the reinforcing bar truss 2 can be supported in a wider area, and the reinforcing bar truss 2 becomes stable and independent. Further, since the truss is formed below the second main bar 20, more trusses can support the first main bar 10 and the second main bar 20, and the deformation of the first main bar 10 and the second main bar 20 is suppressed. be able to. Therefore, the rigidity and strength of the reinforcing bar truss 2 can be improved. Further, a reinforcing bar truss 2 and a deck panel 1 having high rigidity and strength can be provided. Further, since the lattice material 30 is bent and expanded to the outside of the reinforcing bar truss 2 and has the leg portion 37 on the side of the second inflection point 32 of the inclined portion 38, the reinforcing bar truss 2 is stable and self-supporting. With this configuration, it is possible to improve the stability of the reinforcing bar truss 2 when joining the plate member 40 and when placing concrete.

FIG. 9 shows a modification 1 of the first embodiment and the second embodiment. In the lattice lumber 30, the first inflection point 55 is set below the second joint portion 34. At the first inflection point 55, the lattice lumber 30 is bent so as to have an spread in the width direction, and is expanded. Further, a second inflection point 36 is set between the first inflection point 55 and the second inflection point 32. At the second inflection point 36, the lattice material 30 is horizontally bent outward in the width direction to form the leg portion 37.

FIG. 10 shows the first embodiment and the second modification of the second embodiment. The lattice material 30 is formed so as to have a wave shape in which the first inflection point 51 and the second inflection point 52 repeat each other in the length direction. The pitches of the first inflection point 51 and the second inflection point 52 repeating each other are not all the same, but include different pitches. For example, in each of the first changing parts 51, the distance from one first changing part 51 to the adjacent first changing part 51 is set to L3, and the distance from the other first changing part 51 to the adjacent first changing part 51 is set to L3. Assuming that the distance to the 1-conversion portion 51 is L4, L3 and L4 have different configurations. Further, the lattice material 30 has a first inflection point 51 and a second inflection point 52 at different angles. For example, the angle θ3 of one first inflection point 51 and the angle θ4 of the other first inflection point 51 have different configurations. Thereby, it is possible to provide the reinforcing bar truss 2 and the deck panel 1 corresponding to floor slabs of various design sizes and strengths.

The reinforcing bar truss 2 and the deck panel 1 according to the present invention are not limited to the above-described embodiment, and can be implemented in various other forms. As the reinforcing bars used for the two main reinforcing bars, reinforcing bars having the same diameter may be used for the first main reinforcing bar 10 and the second main reinforcing bar 20, or reinforcing bars having different diameters may be used. The reinforcing bar having a circular cross-sectional shape is not limited to the reinforcing bar, and various types and cross-sectional shaped reinforcing bars may be used. Further, the height positions of the first main bar 10 and the second main bar 20 can be appropriately set according to the size of the reinforcing bar truss 2. Further, the first main bar 10 and the second main bar 20 are not limited to a linear shape, and may be processed into another shape such as an arc shape depending on the design of the floor slab. In the above embodiment, an example in which a hot-dip galvanized steel plate is used for the plate member 40 is shown, but another metal plate may be used.

The first inflection point 35 of the lattice material 30 may be set at the same position as the second joint portion 34, or may be set below the second joint portion 34. Further, since the position of the second inflection point 36 can be arbitrarily set, the reinforcing bar truss 2 having various heights and widths can be configured. The wave shape of the lattice material 30 is not limited to the configuration in which the first inflection point 31 and the second inflection point 32 repeat at the same amplitude and pitch, and may include partially different amplitudes and different pitches. can. For example, the lattice material 30 may be configured to repeat the first inflection point 31 and the second inflection point 32 with partially different amplitudes according to the step of the floor slab.

1 Deck panel 2 Reinforcing bar truss 10 1st main bar 20 2nd main bar 30 Lumber 31 1st inflection point 32 2nd inflection point 33 1st joint part 34 2nd joint part 35 1st bend point 36 2nd bend Point 37 Leg 40 Plate member

Claims (5)

With the linear first main bar,
A linear second main bar that is separated from the lower side of the first main bar and is located along the first main bar.
It has a pair of wavy lattice materials that repeat the first inflection point and the second inflection point in the length direction.
The pair of lattice materials face each other so as to sandwich the first main bar and the second main bar from both sides in the width direction intersecting the extending direction of the first main bar and the second main bar, and the one lattice material. Each of the first bending portions and the first bending portion of the other lattice material are arranged so as to face each other.
The first main bar and the pair of lattice lumbers each have a first joint portion set as a contact portion.
A reinforcing bar truss having a second joint portion set at a portion where the second main bar and an intermediate portion between the first inflection point and the second inflection point of the pair of lattice lumbers are in contact with each other. The reinforcing bar truss according to claim 1.
The pair of lattice materials each have a first inflection point between each of the second joint portions and each of the second inflection points.
A reinforcing bar truss that bends at the first inflection point so as to have a spread in each of the width directions. The reinforcing bar truss according to claim 1 or 2.
The pair of lattice materials each has a second inflection point between each of the second joint portions and each of the second inflection points.
At the second inflection point, each of the second inflection points of the one lattice material and the second inflection point of the other lattice material have legs bent so as to be separated from each other. Reinforcing bar truss. The reinforcing bar truss according to any one of claims 1 to 3.
The pair of lattice trusses are rebar trusses having a wave shape in which the first inflection point and the second inflection point are repeated with each other at the same amplitude and pitch. The reinforcing bar truss according to any one of claims 1 to 4.
It has a metal plate member and
A deck panel in which each of the second inflection points and the plate member are joined and integrated.

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