Deck Plates and Deck Plate Assemblies

Abstract

To provide a deck plate the number of which is easily ascertained to be required to construct a concrete slab with a width in meters, and a deck plate assembly connecting these deck plates.SOLUTION: In a deck plate 1A having two sets of rebar trusses 2, where the rebar trusses 2 are integrated with a bottom plate portion 40 used for a concrete slab C10 and are hung over a frame beam 5 of a building in line in the width direction of the bottom plate portion 40, the bottom plate portion 40 comprises: an installation area 41 in which rebar trusses 2 are installed one set at a time; and a first end edge portion 45A extending along an end edge 45 on one side in the width direction; and a second end edge portion 45B extending along the end edge 45 on the other side in the width direction and connectable with the first end edge portion 45A to each other; so that by connecting multiple deck plates 1A to each other, these deck Plates 1A are connected in the width direction with a working width of 500 [mm] to constitute a deck plate assembly 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to deck plates and deck plate assemblies. [Background technology]

[0002] 2. Description of the Related Art Conventionally, as a structural material used in the construction of concrete slabs and the like, a truss deck plate has been known in which a reinforcing bar truss having main reinforcement bars and lattice materials is joined to a plate-like member to form an integral unit.

[0003] For example, Patent Document 1 discloses a deck plate with two sets of reinforcing bar trusses arranged on the bottom plate. In this deck plate, the reinforcing bar trusses have one upper main bar and two lower main bars each connected to a pair of lattice materials bent into a wave shape. The deck plate is hung across beams that form the skeleton of the building (hereinafter referred to as "skeletal beams"), and the ends of the deck plate are fixed to the skeleton beams by connecting metal fittings that engage with the lower main bars of the reinforcing bar trusses. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-262859 A Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned deck plate is often used in a state where a deck plate assembly is formed by connecting multiple pieces in the width direction. Conventionally, deck plates with a working width of 400 mm and a spacing distance of the upper main reinforcement of the reinforcing bar truss of 200 mm have been widely used for this deck plate assembly. However, there has been a need to reduce the number of deck plates required to secure the same working width for the above deck plate assembly.

[0006] The present disclosure provides a deck plate in which fewer deck plates are required to ensure the working width of a deck plate assembly, compared to the deck plates with a working width of 400 mm that have been widely used in the past, and a deck plate assembly using this deck plate. [Means for solving the problem]

[0007] In order to solve the above problems, the deck plate and deck plate assembly of the present disclosure take the following measures.

[0008] First, the first disclosure relates to a deck plate having two sets of reinforcing bar trusses each including an upper main bar extending linearly, two lower main bars extending linearly below the upper main bar in parallel and spaced apart from each other, and a pair of wavy lattice members each having peaks and valleys repeated along the length of the upper main bar, the reinforcing bar trusses being integrated with a bottom plate portion serving as a structural material used for a concrete slab, and being hung across a structural beam of a building in a state lined up in the width direction of the bottom plate portion, the bottom plate portion having two strip-like extensions along the length direction on the plate surface of the bottom plate portion, each of which has an installation area in which one set of the reinforcing bar trusses is installed, and a side of one side of the bottom plate portion in the width direction. The deck plates have a first edge portion extending along the edge, and a second edge portion extending along the other edge of the bottom plate portion in the width direction and configured to be connectable to the first edge portion, and the two installation areas are set so that the separation distance between the upper main reinforcement bars in the reinforcing bar truss installed in each of the two installation areas is set to 250 mm, and by connecting a plurality of the deck plates to each other by connecting the first edge portion of one of the deck plates to the second edge portion of the other of the deck plates, it is possible to form a deck plate assembly in which the deck plates are connected in the width direction with a working width of 500 mm.

[0009] The working width of a deck plate formed by connecting deck plates in the width direction is equal to the sum of the working widths of the connected deck plates. Here, the deck plate according to the first disclosure has a wider working width per deck plate than the deck plate with a working width of 400 mm that has been widely used in the past. This makes it possible to provide a deck plate that requires fewer sheets to ensure the working width of the deck plate assembly compared to the deck plate with a working width of 400 mm that has been widely used in the past.

[0010] Here, because two sets of rebar trusses are used per deck plate, the number of sets of rebar trusses used in one deck plate assembly is less than the number of sets of rebar trusses used in the above-mentioned conventional deck plate assembly. Therefore, a deck plate assembly using the deck plate according to the first disclosure can reduce the amount of metal materials, such as rebar, used in the entire assembly compared to the above-mentioned conventional deck plate assembly.

[0011] Here, the deck plate according to the first disclosure may be a deck plate according to the second disclosure described below, which has at least one reinforcing rib provided on the plate surface of the bottom plate portion between the two installation areas, the reinforcing rib extending along the length direction.

[0012] In the deck plate according to the second disclosure, the bottom plate portion is reinforced by installing a reinforcing bar truss in each of the two installation areas. In addition, the deck plate according to the second disclosure can further reinforce the bottom plate portion by extending a reinforcing rib between the two installation areas.

[0013] Next, the third disclosure is the deck plate assembly described above in the explanation of the first disclosure, which comprises a plurality of main reinforcement support fittings that are spanned from above each of the upper main reinforcements in each of the reinforcing bar trusses that are arranged in the width direction in a direction that intersects with the length direction, and reinforcing main reinforcements that are reinforcing bars of the same diameter as the upper main reinforcements and extend linearly in parallel to the sides of the upper main reinforcements, and each of the main reinforcement support fittings is engaged with at least one of the upper main reinforcements in the intersecting direction, The reinforcing bars are provided with a locking portion which positions the main reinforcement support bracket in the width direction, and a concave portion which is recessed downwardly in the center between two adjacent upper main reinforcements in the row of upper main reinforcements, and the main reinforcement support brackets are arranged in a row in the length direction by being aligned in the length direction, and the reinforcing main reinforcements are fitted into the row of concave portions from above, and are arranged so that their vertical heights as viewed from the bottom plate portion are aligned with those of the upper main reinforcements.

[0014] According to the deck plate assembly of the third disclosure, the number of main bars per unit width can be increased by extending the reinforcing main bars to the center of the upper main bars of two adjacent sets of reinforcing trusses. This allows the deck plate assembly of the third disclosure to further increase the strength of the concrete slab after concrete is poured.

[0015] Furthermore, according to the deck plate assembly of the third disclosure, the reinforcing main bars can be arranged by the relatively simple task of fitting them from above into the row of recessed portions in each main bar support fitting.

[0016] Furthermore, with the deck plate assembly according to the third disclosure, the heights of the upper main bars and the reinforcing main bars in the vertical direction as viewed from the bottom plate are aligned, which makes it possible to align the cover thickness of the part of the concrete slab where the upper main bars are located and the cover thickness of the part of the reinforcing main bars in the concrete slab after concrete is poured.

[0017] Here, the deck plate assembly according to the third disclosure may be the deck plate assembly according to the fourth disclosure described below. In this deck plate assembly according to the fourth disclosure, the recessed portion is formed to a size that allows two reinforcing bars having the same diameter as the upper main bars to be arranged side by side in the width direction.

[0018] According to the deck plate assembly of the fourth disclosure, by arranging the ends of two reinforcing main bars side-by-side in the width direction in one concave portion, the reinforcing main bars can be joined together to be extended. Effect of the Invention

[0019] The present disclosure can provide a deck plate in which fewer deck plates are required to ensure the working width of a deck plate assembly, compared to the deck plates with a working width of 400 mm that have been widely used in the past, and a deck plate assembly using this deck plate. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view of a deck plate assembly 1 according to a first embodiment. [Diagram 2] FIG. 1 is a front view of a deck plate assembly 1 according to a first embodiment. [Diagram 3] FIG. 2 is a front view of deck plate 1A. [Figure 4] FIG. 11 is a front view of a deck plate assembly 101 according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] <First embodiment> As shown in Fig. 2, the deck plate assembly 1 according to the first embodiment of the present disclosure has a configuration in which a plurality of deck plates 1A are connected in the width direction of their bottom plate portions 40 (hereinafter referred to as the "width direction"). This allows the deck plate assembly 1 to be used as a floor base material that receives concrete C11 when constructing a concrete slab C10. The deck plate 1A and the deck plate assembly 1 will be described below.

[0022] <Deck plate configuration> As shown in Figure 1, the deck plate 1A is a structural material used in a deck plate assembly 1. The deck plates 1A are lined up in the width direction at the construction site and hung across the structural beams 5 of the building. In other words, multiple deck plates 1A are laid in parallel between the structural beams 5. After necessary reinforcement work is carried out on the reinforcing bar trusses 2, concrete C11 (see Figure 2) is poured. As a result, the concrete slab C10 (see Figure 2) can be constructed.

[0023] As shown in FIG. 3, the deck plate 1A has two sets of reinforcing bar trusses 2 and a bottom plate portion 40. The two sets of reinforcing bar trusses 2 are arranged side by side at a predetermined interval and fixed integrally to the plate surface of the bottom plate portion 40. Here, the working width L6 of the deck plate 1A is set to 500 [mm]. As a result, the deck plates 1A connected in the width direction can be configured to have a working width L7 of 1 [m] per two pieces as shown in FIG. 2. Therefore, the number of deck plates 1A required to construct a concrete slab C10 having a width in meters is twice the number of meters of the width of the concrete slab C10. As a result, it is possible to provide a deck plate 1A in which the number of pieces required to construct a concrete slab C10 having a width in meters is easily grasped, and a deck plate assembly 1 in which the deck plates 1A are connected.

[0024] Deck plate 1A has a wider working width per deck plate than the deck plate (not shown) with a working width of 400 mm that has been widely used in the past, and therefore fewer deck plates are required to ensure the working width of the deck plate assembly.

[0025] For example, when a deck plate assembly with a working width of 2 m is constructed with a deck plate with a working width of 400 mm, which has been conventionally adopted, the number of deck plates required is five. On the other hand, when a deck plate assembly with a working width of 2 m is constructed with a deck plate 1A (see FIG. 3) with a working width L6 of 500 mm, the number of deck plates required is four. This is one less than the number of deck plates required when a conventional deck plate assembly with a working width of 2 m is constructed with a deck plate with a working width of 400 mm. Since two sets of reinforcing bar trusses are used for each deck plate, the number of sets of reinforcing bar trusses 2 used in one deck plate assembly 1 is two less than the number of sets of reinforcing bar trusses used in the conventional deck plate assembly. Accordingly, the deck plate assembly 1 uses less metal materials such as reinforcing bars in the entire assembly than the conventional deck plate assembly.

[0026] The dimensions of the reinforcing bar truss 2 and the bottom plate portion 40 in the length direction of the upper main reinforcement 10 (hereinafter referred to as the "length direction", see Fig. 1) are set according to the size of the concrete slab C10. Also, the vertical distance of the upper main reinforcement 10 in the reinforcing bar truss 2 as viewed from the bottom plate portion 40 is set according to the thickness of the concrete slab C10.

[0027] <Structure of reinforcing bar truss> As shown in FIG. 1, the reinforcing bar truss 2 comprises one upper main reinforcement 10, two lower main reinforcements 20, and a pair of lattice members 30. The upper main reinforcement 10 and the two lower main reinforcements 20 each extend linearly. The two lower main reinforcements 20 are disposed below the upper main reinforcement 10 in parallel. The pair of lattice members 30 are wavy with repeated peaks 31 and valleys 32 along the length direction, and are disposed opposite each other so as to sandwich the upper main reinforcement 10 from both sides in the width direction intersecting with the length direction, and the peaks 31 are joined to the upper main reinforcement 10. The lower main reinforcement 20 is disposed diagonally below the upper main reinforcement 10 so that one of the pair of lattice members 30 contacts each side of the pair of lattice members 30.

[0028] As shown in FIG. 3, the pair of lattice members 30 in the reinforcing bar truss 2 is a pair of one lattice member 30a and the other lattice member 30b. These lattice members 30a, 30b are fixed to the upper main reinforcement 10 facing each other so as to sandwich the upper main reinforcement 10 from both sides in the width direction intersecting with the length direction. In addition, the respective valleys 32a, 32b facing each other across the upper main reinforcement 10 are fixed to the bottom plate portion 40 in a state of being spaced apart from each other, and the lattice members 30a, 30b are configured to be spread out so as to have a spread in the width direction. That is, the reinforcing bar truss 2 is arranged so that the pair of lattice members 30 are triangular when viewed from the length direction. As a result, the pair of lattice members 30 can prevent the upper main reinforcement 10 from moving downward. The distance L1 between the opposing valleys 32a, 32b in the width direction can be set arbitrarily, and the lattice materials 30a, 30b expand in accordance with the distance L1.

[0029] <Upper and Lower Main Reinforcements> As shown in FIG. 1, the upper main reinforcement 10 and the lower main reinforcement 20 are formed by stretching a metal (e.g., steel) wire in the axial direction and shaping it into a straight shape. For example, deformed bars may be used for the upper main reinforcement 10 and the lower main reinforcement 20. Reinforcements having different diameters are used for the upper main reinforcement 10 and the lower main reinforcement 20. The diameter of the upper main reinforcement 10 is larger than that of the lower main reinforcement 20. The reinforcing bars used for these main reinforcements may be reinforcing bars having the same diameter for the upper main reinforcement 10 and the lower main reinforcement 20, or reinforcing bars having different diameters may be used. The height positions of the upper main reinforcement 10 and the lower main reinforcement 20 can be set appropriately according to the size of the reinforcing bar truss 2.

[0030] <Lattice material composition> The pair of lattice materials 30 are formed by bending metal (e.g., steel) wires so that they are wavy along the length direction. For example, iron wire coils may be used for the pair of lattice materials 30. The pair of lattice materials 30 have an inclined portion 38 between a peak portion 31 and a valley portion 32. That is, the pair of lattice materials 30 each have an upper inclined portion 38U that extends obliquely upward and a lower inclined portion 38D that extends obliquely downward.

[0031] Specifically, the lattice material 30, which extends in a straight line diagonally upward in the length direction, is turned diagonally downward and bent. The curved portion of the lattice material 30, which is bent from diagonally upward to diagonally downward, becomes the peak portion 31. Similarly, the lattice material 30, which extends in a straight line diagonally downward, is turned diagonally upward. The curved portion of the lattice material 30, which is bent from diagonally downward to diagonally upward, becomes the valley portion 32. In addition, the portion extending diagonally upward from the valley portion 32 toward the peak portion 31 in the length direction is the upward inclined portion 38U, and the portion extending diagonally downward from the peak portion 31 toward the valley portion 32 is the downward inclined portion 38D.

[0032] In other words, the lattice material 30 has an upwardly inclined portion 38U extending toward the peak portion 31, and is bent at the peak portion 31, changing direction to diagonally downward. The lattice material 30 has a downwardly inclined portion 38D extending toward the valley portion 32, and is bent at the valley portion 32, changing direction to diagonally upward. The ends of the lattice material 30 in the length direction may be configured as mountain cuts cut at the peak portions 31, or may be configured as valley cuts cut at the valley portions 32 (not shown).

[0033] As shown in Fig. 3, the lower main reinforcement 20 is disposed so as to contact the side surfaces of the pair of lattice materials 30a, 30b. The one upper main reinforcement 10 and the two lower main reinforcements 20 are spaced apart from each other. The lower main reinforcement 20 is located diagonally below the upper main reinforcement 10. It is preferable that the upper main reinforcement 10 and the lower main reinforcement 20 are parallel to each other.

[0034] The lattice material 30 has a first joint portion 33 and a second joint portion 34. The first joint portion 33 is set in each of the pair of lattice materials 30a, 30b at a portion where the upper outer peripheral surface of the upper main reinforcement 10 and the apex portion of the peak portion 31 of the lattice material 30 contact each other. At each of the first joint portions 33, the upper main reinforcement 10 and the pair of lattice materials 30 are joined by welding. The position of the first joint portion 33 can be set arbitrarily.

[0035] The second joint parts 34 are set at the parts of the pair of lattice members 30a, 30b where the lower main reinforcement 20 contacts the intermediate parts between the peaks 31 and the valleys 32. At each of the second joint parts 34, the lower main reinforcement 20 is joined to the lattice members 30a, 30b by welding. The position of the second joint parts 34 can be set arbitrarily. That is, the second joint parts 34 may be set on the inside or outside of the reinforced bar truss 2.

[0036] As shown in FIG. 1, the lattice material 30 is arranged such that the peaks 31a of one lattice material 30a face the peaks 31b of the other lattice material 30b, and the valleys 32a of one lattice material 30a face the valleys 32b of the other lattice material 30b. The lattice material 30 has a structure in which the peaks 31 and valleys 32 are repeated with the same amplitude and pitch. Therefore, the angle θ1 of the peaks 31 and the angle θ2 of the valleys 32 are constant. In other words, the peaks 31a of one lattice material 30a and the peaks 31b of the other lattice material 30b are arranged to overlap each other when viewed from the width direction. Similarly, the valleys 32a of one lattice material 30a and the valleys 32b of the other lattice material 30b are arranged to overlap each other when viewed from the width direction.

[0037] As shown in FIG. 3, each of the lattice materials 30 has a bending point 36 set arbitrarily between the second joint portion 34 and the valley portion 32. Also, each has a leg portion 37 bent at the bending point 36. Specifically, the lattice materials 30a, 30b are bent at the bending point 36 so that the valley portion 32a of one lattice material 30a and the valley portion 32b of the other lattice material 30b move away from each other, and the leg portion 37 is formed on the valley portion 32 side of the inclined portion 38. In other words, the pair of lattice materials 30 are bent at the bending point 36 so as to be horizontally outward in the width direction. The portion from the bending point 36 to the valley portion 32 becomes the leg portion 37.

[0038] The expansion angle θ5 of the lattice material 30 as viewed in the length direction (see FIG. 1), and the bending angle θ6 of the lattice material 30 at the bending point 36 are set so that the legs 37 are horizontal. The expansion angle θ5 and the bending angle θ6 can be set arbitrarily according to the size of the reinforced concrete truss 2. Thus, it is possible to reduce the expansion angle θ5 and to configure the pair of lattice materials 30 so that they do not expand in the width direction. Also, the pair of lattice materials 30 can be arranged so that they do not expand in the width direction.

[0039] <Bottom plate configuration> The bottom plate portion 40 is a metal plate member, and may be, for example, a hot-dip galvanized steel plate. The bottom plate portion 40 has two installation areas 41, a first edge portion 45A, and a second edge portion 45B on its plate surface. Here, the installation areas 41 are areas in which two installation areas extend in a strip shape along the length direction (see FIG. 1), and each of the installation areas 41 is an area in which one set of the reinforcing bar truss 2 is installed. The first edge portion 45A is a portion that extends along the edge 45 on one side in the width direction of the bottom plate portion 40. The second edge portion 45B is a portion that extends along the edge 45 on the other side in the width direction of the bottom plate portion 40, and is configured to be connectable to the first edge portion 45A. In addition, the widthwise dimension L8 of the bottom plate portion 40 is set to be the sum of the widthwise dimension L9 at the overlapping portion where the first end edge portion 45A and the second end edge portion 45B are connected when viewed from above in Figure 2, and the working width L6 of the deck plate 1A, which is 500 mm.

[0040] The two installation areas 41 are set so that the separation distance L5 between the upper main reinforcements 10 in the reinforcing bar trusses 2 installed in each of them is 250 [mm]. In other words, the separation distance L5 between the upper main reinforcements 10 in these reinforcing bar trusses 2 is the distance obtained by dividing the working width L6 of the deck plate 1A by the number of sets of the reinforcing bar trusses 2, and is set to be 250 [mm]. As a result, the separation distance L5 becomes the same as the interval L10 between the upper main reinforcements 10 of the reinforcing bar trusses 2 on the first edge portion 45A side of one deck plate 1A in the deck plate assembly 1 and the upper main reinforcements 10 of the reinforcing bar trusses 2 on the second edge portion 45B side of the other deck plate 1A, as shown in FIG. 2.

[0041] As shown in Fig. 3, the installation area 41 has protrusions 41A formed on both ends in the width direction in accordance with the installation position of the reinforcing bar truss 2. The protrusions 41A are formed by the bottom plate portion 40 protruding upward in the thickness direction and extending linearly along the length direction. The cross-sectional shape of the protrusions 41A is semicircular.

[0042] The valley portion 32 of the lattice material 30 is joined to the protrusion portion 41A. Specifically, the leg portion 37 formed on the valley portion 32 side of the inclined portion 38 of the lattice material 30 is joined by welding at the portion where it abuts against the protrusion portion 41A, i.e., at the fixing portion 39.

[0043] In the deck plate 1A, as shown in FIG. 1, the reinforcing bar truss 2 is installed in each of the two installation areas 41, thereby reinforcing the bottom plate portion 40. In addition, the deck plate 1A has two reinforcing ribs 42 extending along the length direction in a portion of the plate surface of the bottom plate portion 40 between the two installation areas 41. These reinforcing ribs 42 improve the strength of the bottom plate portion 40, similar to the reinforcing bar truss 2. That is, the reinforcing rib 42 extending along the length direction between the two installation areas further reinforces the bottom plate portion 40. Note that the reinforcing rib 42 in this embodiment has the same shape as the protrusion portion 41A, for example.

[0044] As shown in FIG. 1, a plurality of deck plates 1A can be laid in line in accordance with the size of the concrete slab C10 (see FIG. 2). When a plurality of deck plates 1A are laid in line in the width direction, the edges of the adjacent bottom plate portions 40 are configured to engage with each other. In other words, a deck plate assembly 1 is configured by connecting a second edge portion 45B of one of the deck plates 1A and a first edge portion 45A of the other deck plate 1A. Here, the first edge portion 45A is, for example, a plate-like shape in which an edge 45 on one side in the width direction of the bottom plate portion 40 protrudes upward and extends along the length direction. In addition, the second edge portion 45B is, for example, a groove (see FIG. 3) in which the edge 45 on the other side in the width direction of the bottom plate portion 40 is recessed downward, and the size of this groove is set so that the first edge portion 45A can be inserted. In other words, the first edge portion 45A is a single seam used as an insertion side when connecting one deck plate 1A to another deck plate 1A in the deck plate assembly 1. Similarly, the second edge portion 45B is a double seam used as an insertion side when connecting one deck plate 1A to another deck plate 1A in the deck plate assembly 1.

[0045] <Deck plate assembly configuration> The deck plate assembly 1 includes a plurality of deck plates 1A, a plurality of main reinforcement support fittings 82, and reinforcing main reinforcements 81. Here, the main reinforcement support fittings 82 are arranged in a state of being spanned in a direction intersecting the length direction on the upper main reinforcements 10 of each reinforcing bar truss 2 arranged in the width direction. In addition, the reinforcing main reinforcements 81 are subjected to a force applied from above to the arranged main reinforcement support fittings 82, and the force applied to the main reinforcement support fittings 82 is applied to the reinforcing bar truss 2. In other words, the support provided between the reinforcing main reinforcements 81, the main reinforcement support fittings 82, and the reinforcing bar truss 2 reinforces the center between two adjacent upper main reinforcements 10 in each row of the upper main reinforcements 10. The reinforcing main reinforcements 81 and the main reinforcement support fittings 82 will be described below.

[0046] <Structure of reinforcing bars> The reinforcing main bars 81 are made by stretching metal (e.g. steel) wires in the axial direction and forming them into a straight line. The reinforcing main bars 81 may be steel bars with the same diameter as the upper main bars 10. In the deck plate assembly 1, the reinforcing main bars 81 extend linearly in parallel to the sides of the upper main bars 10 in the installed state. The length dimension of the reinforcing main bars 81 may be shorter than that of the upper main bars 10.

[0047] <Configuration of main reinforcement support bracket> 2, the main reinforcement support fitting 82 is formed by bending a metal (e.g., steel) wire rod having a circular cross section. Here, the bending process includes forming the locking portion 82A and the recessed portion 82B. As a result, the main reinforcement support fitting 82 has a shape including the locking portion 82A and the recessed portion 82B.

[0048] The locking portion 82A is formed by bending the end of the wire rod in the direction in which it extends at a right angle. Here, the direction in which the locking portion 82A is bent is the same as the direction in which the concave portion 82B is concave. In this way, the main reinforcement support bracket 82 in the installed state in the deck plate assembly 1 has a circular cross section, so that the locking portion 82A is arranged so that it faces downward. As a result, the locking portion 82A can realize an engaged state in which the main reinforcement support bracket 82 in the installed state engages with the upper main reinforcement 10 in a direction intersecting the length direction. The locking portion 82A in the engaged state is engaged with at least one of the upper main reinforcements 10 in a direction intersecting the length direction, thereby positioning the main reinforcement support bracket 82 in the width direction. As a result, the locking portion 82A of the main reinforcement support bracket 82 in the installed state can prevent the concave portion 82B from moving relative to the upper main reinforcement 10.

[0049] The concave portions 82B are formed by periodically forming crank-shaped bends in the wire rod in the extending direction of the wire rod. Specifically, the concave portions 82B in the main reinforcement support fittings 82 in the installed state are provided in a state of being recessed downward in the center between two adjacent upper main reinforcements 10 in each row of the upper main reinforcements 10. Also, as shown in FIG. 1, when a plurality of main reinforcement support fittings 82 are arranged in a row in the longitudinal direction, the corresponding concave portions 82B in each of the main reinforcement support fittings 82 form a row 82C arranged in the longitudinal direction. Then, the row 82C of the corresponding concave portions 82B is positioned along the longitudinal direction. As a result, the row 82C of the corresponding concave portions 82B can be fitted from above into the row 82C of the corresponding concave portions 82B in each of the main reinforcement support fittings 82 in which the reinforcing main reinforcements 81 are arranged in the deck plate assembly 1.

[0050] Furthermore, with the deck plate assembly 1, the number of main bars per unit width can be increased by extending the reinforcing main bars 81 to the center of the upper main bars 10 in two adjacent sets of steel bar trusses 2. This enables the deck plate assembly 1 to further increase the strength of the concrete slab C10 (see FIG. 2) after concrete C11 (see FIG. 2) is poured.

[0051] In addition, the contractor (not shown) constructing the deck plate assembly 1 can arrange the reinforcing main bars 81 by the relatively simple task of fitting them from above into the row 82C of the corresponding recessed portions 82B in each of the main bar support brackets 82.

[0052] Here, the downward recess of the recessed portion 82B in the installed state is set to have a dimension substantially equal to the sum of the outer diameter of the wire rod in the main reinforcement support bracket 82 and the outer diameter of the upper main reinforcement 10, as shown in Fig. 2. In this way, the reinforcing main reinforcement 81 in the fitted state is installed so that its height in the up-down direction as viewed from the bottom plate portion 40 is aligned with that of each of the upper main reinforcement 10. That is, the reinforcing main reinforcement 81 and the upper main reinforcement 10 in the fitted state are aligned in the up-down direction as viewed from the bottom plate portion 40. This allows the cover thickness C10A of the portion above the upper main reinforcement 10 and the cover thickness C10B of the portion above the reinforcing main reinforcement 81 in the concrete slab C10 after concrete C11 is poured to be aligned.

[0053] In addition, the recess that is recessed downward of the recessed portion 82B in the installed state is formed to a size that allows two reinforcing bars having the same diameter as the upper main reinforcement 10 to be arranged side by side in the width direction. As a result, by arranging two end portions 81A of the reinforcing main reinforcement 81 side by side in the width direction in one recessed portion 82B, the reinforcing main reinforcement 81 can be joined and extended.

[0054] <Deck plate assembly configuration procedure> An example of the work involved in constructing the deck plate assembly 1 according to the first embodiment described above will be described with reference to FIG.

[0055] First, a builder (not shown) checks the number of deck plates 1A to be laid between the structural beams 5 of the building at the construction site. The number of deck plates 1A required is determined according to the size of the concrete slab C10. In general, the size of the concrete slab C10 has a width measured in meters. This allows the builder to intuitively grasp the number of deck plates 1A required to construct the concrete slab C10.

[0056] Next, a builder (not shown) spans the deck plates 1A across the structural beams 5 of the building, lined up in the width direction. That is, the builder lays the deck plates 1A so that multiple deck plates 1A are spanned in parallel between the structural beams 5. Here, the builder connects the second edge portion 45B of one of the required multiple deck plates 1A to the first edge portion 45A of the other deck plates 1A. This allows the deck plate assembly 1 to be constructed as a work-in-progress.

[0057] Next, a contractor (not shown) arranges multiple main reinforcement support fittings 82 in the work-in-progress deck plate assembly 1. At this time, the locking portion 82A of the main reinforcement support fittings 82 is locked to the upper main reinforcement 10 on one side in the width direction in a direction intersecting the length direction, thereby positioning each of the main reinforcement support fittings 82. Then, the corresponding recessed portions 82B of each of the main reinforcement support fittings 82 form a row 82C aligned in the length direction.

[0058] Next, a contractor (not shown) fits the reinforcing main bars 81 from above into the rows 82C of the corresponding recessed portions 82B in each of the main bar support fittings 82. This allows the reinforcing main bars 81 to be disposed in the center between two adjacent upper main bars 10 in each row of the upper main bars 10 by the relatively simple task of fitting. Therefore, the contractor can construct the deck plate assembly 1 by relatively simple tasks.

[0059] <Actions and Effects> The working width of a deck plate formed by connecting deck plates in the width direction is equal to the sum of the working widths of the connected deck plates. Here, the above-mentioned deck plate 1A has a wider working width per deck plate than a deck plate (not shown) with a working width of 400 mm that has been widely used in the past. This makes it possible to provide a deck plate 1A that requires fewer deck plates to ensure the working width of the deck plate assembly 1 compared to a deck plate with a working width of 400 mm that has been widely used in the past.

[0060] Here, two sets of reinforcing bar trusses 2 are used for each deck plate 1A, so the number of sets of reinforcing bar trusses used in one deck plate assembly 1 is fewer than the number of sets of reinforcing bar trusses used in the above-mentioned conventional deck plate assembly. Therefore, the deck plate assembly 1 that employs the deck plate 1A can reduce the amount of metal materials such as reinforcing bars used in the entire assembly compared to the above-mentioned conventional deck plate assembly.

[0061] According to the above-mentioned deck plate 1A, two deck plates 1A connected in the width direction can be used to construct a deck plate assembly 1 having a working width L7 of 1 [m]. Therefore, the number of deck plates 1A required to construct a concrete slab C10 having a width in meters is twice the number of meters of the width of the concrete slab C10. This makes it possible to provide a deck plate 1A in which the number of deck plates 1A required to construct a concrete slab C10 having a width in meters is easy to grasp, and a deck plate assembly 1 in which these deck plates 1A are connected.

[0062] In the above-described deck plate 1A, the bottom plate portion 40 is reinforced by installing the reinforcing bar trusses 2 in each of the two installation areas 41. In addition, the deck plate 1A can further reinforce the bottom plate portion 40 by extending the reinforcing ribs 42 along the longitudinal direction of the upper main reinforcement 10.

[0063] Conventionally, deck plates that have been widely used have a working width of 400 mm and a spacing distance of 200 mm between the upper main reinforcements in the reinforcing bar truss (not shown). In contrast, the deck plate 1A described above has a spacing distance L5 (see FIG. 3) between the upper main reinforcements 10 in the reinforcing bar truss 2 that is relatively longer by 25%. This deck plate 1A has the above-mentioned reinforcement configuration and can meet the design requirements for a deck plate used in the deck plate assembly 1.

[0064] According to the above-mentioned deck plate assembly 1, it is possible to increase the number of main bars per unit width by extending the reinforcing main bars 81 to the center of the upper main bars 10 in two adjacent sets of steel bar trusses 2. This enables the deck plate assembly 1 to further increase the strength of the concrete slab C10 after the concrete C11 is poured.

[0065] According to the above-described deck plate assembly 1, the reinforcing main bars 81 can be arranged by the relatively simple operation of fitting them into the rows 82C of the recessed portions 82B of each main bar support metal fitting 82 from above.

[0066] According to the above-described deck plate assembly 1, the upper main reinforcement bars 10 and the reinforcing main reinforcement bars 81 are aligned in height in the up-down direction as viewed from the bottom plate portion 40. This makes it possible to align the cover thickness C10A of the portion where the upper main reinforcement bars 10 are located and the cover thickness C10B of the portion where the reinforcing main reinforcement bars 81 are located in the concrete slab C10 after the concrete C11 is poured.

[0067] According to the above-described deck plate assembly 1, by arranging two ends of the reinforcing main bars 81 side by side in the width direction in one recessed portion 82B, the reinforcing main bars 81 can be joined and extended.

[0068] <Second embodiment> Next, the configuration of a deck plate assembly 101 according to a second embodiment of the present disclosure will be described with reference to Fig. 4. The deck plate assembly 101 according to the second embodiment is a modified version of the deck plate assembly 1 according to the first embodiment. Therefore, for configurations common to the respective configurations of the deck plate assembly 1 according to the above-described first embodiment, reference numerals are added by adding "100" to the reference numerals attached to the respective configurations of the deck plate assembly 1 according to the first embodiment, and detailed description thereof will be omitted.

[0069] <Configuration of main reinforcement support bracket> The main reinforcement support fitting 182 is formed by bending a metal wire rod having a circular cross section. Here, the bending process includes forming the locking portion 182A and the recessed portion 182B. As a result, the main reinforcement support fitting 182 has a shape including the locking portion 182A and the recessed portion 182B.

[0070] The locking portion 182A is formed by bending the end of the wire rod in the direction in which it extends at a right angle. Here, the direction in which the locking portion 182A is bent is the same as the direction in which the concave portion 182B is concave. In this way, the main reinforcement support bracket 182 in the installed state in the deck plate assembly 101 is arranged so that the locking portion 182A faces downward. As a result, the locking portion 182A can realize an engaged state in which the main reinforcement support bracket 182 in the installed state is engaged in a direction intersecting the length direction. The locking portion 182A in the engaged state is engaged with at least one of the upper main reinforcements 110 in a direction intersecting the length direction, thereby positioning the main reinforcement support bracket 182 in the width direction. As a result, the locking portion 182A of the main reinforcement support bracket 182 in the installed state can prevent the concave portion 182B from moving relative to the upper main reinforcements 110. In this embodiment, the main reinforcement support fitting 182 is positioned in the width direction so that the recess of its recessed portion 182B is located at the center of the upper main reinforcements 110 in the two sets of steel bar trusses 102.

[0071] The concave portions 182B are formed by periodically forming V-shaped bends in the wire in the extending direction of the wire. Specifically, the concave portions 182B in the main reinforcement support fittings 82 in the installed state are provided in a state of being recessed downward in the center between two adjacent upper main reinforcements 110 in each row of the upper main reinforcements 110. When a plurality of main reinforcement support fittings 182 are arranged in a row in the length direction, the corresponding concave portions 182B in each of the main reinforcement support fittings 182 form a row (not shown) arranged in the length direction. Then, the row of the corresponding concave portions 182B is positioned along the length direction. As a result, the row of the corresponding concave portions 182B can be fitted from above into the row of the corresponding concave portions 182B in each of the main reinforcement support fittings 182 in which the reinforcing main reinforcements 181 are arranged in the deck plate assembly 101. In this fitted state, each reinforcing main bar 181 is locked in the V-shaped bend in the recessed portion 182B, thereby preventing the position from shifting in the width direction (see FIG. 4).

[0072] Furthermore, according to the deck plate assembly 101, it is possible to increase the number of main bars per unit width by extending the reinforcing main bars 181 to the center of the upper main bars 110 in two adjacent sets of steel bar trusses 102. This allows the deck plate assembly 101 to further increase the strength of the concrete slab C20 after the concrete C21 is poured.

[0073] In addition, the contractor (not shown) constructing the deck plate assembly 101 can arrange the reinforcing main bars 181 by the relatively simple task of fitting them from above into the corresponding rows of recessed portions 182B (not shown) in each of the main bar support brackets 182.

[0074] Here, the downward recess of the recessed portion 182B in the installed state is set so that the height of the upper outer peripheral surface of the reinforcing main bars 181 in the fitted state is substantially the same as the height of the upper outer peripheral surface of the upper main bars 110 when viewed from the bottom plate portion 140 in Fig. 4. In other words, the reinforcing main bars 181 in the fitted state are installed so that their vertical heights as viewed from the bottom plate portion 140 are aligned with those of the upper main bars 110. That is, the reinforcing main bars 181 and the upper main bars 110 in the fitted state are aligned in vertical height as viewed from the bottom plate portion 140. This allows the covering thickness C20A of the portion above the upper main bars 110 and the covering thickness C20B of the portion above the reinforcing main bars 181 in the concrete slab C20 after concrete C21 is poured to be aligned.

[0075] According to the above-described deck plate assembly 101, it is possible to suppress displacement of the reinforcing main bars 181 in the fitted state in the width direction.

[0076] According to the above-described deck plate assembly 101, the reinforcing main bars 181 in the fitted state can be brought closer to the center of the upper main bars 110 in the two sets of steel bar trusses 102.

[0077] <Other embodiments> The above describes the embodiments of the present invention. However, it is clear to those skilled in the art that various substitutions, modifications, and changes are possible without departing from the purpose of the present invention. In other words, the embodiment of the present invention may include all substitutions, modifications, and changes that do not deviate from the spirit and purpose of the claims attached to this specification. For example, the following various embodiments can be implemented as the embodiment of the present invention.

[0078] The deck plate according to the present disclosure does not have to have two reinforcing ribs on the bottom plate portion. That is, the deck plate according to the present disclosure may have only one reinforcing rib on the bottom plate portion, or may have three or more reinforcing ribs on the bottom plate portion.

[0079] In the deck plate assembly according to the present disclosure, the shape of the main reinforcement support fittings is not limited to one specific type. For example, the deck plate assembly according to the present disclosure may use both of the two types of main reinforcement support fittings, the main reinforcement support fitting 82 shown in FIG. 2 and the main reinforcement support fitting 182 shown in FIG. 4. In this case, the main reinforcement support fittings at the position where the reinforcing main bars are spliced ​​may be the main reinforcement support fittings 82, and the main reinforcement support fittings at other positions may be the main reinforcement support fittings 182. In this case, the deck plate assembly can simultaneously splice two reinforcing main bars side by side in the width direction and prevent the reinforcing main bars from shifting in the width direction.

[0080] In the deck plate assembly according to the present disclosure, the reinforcing main bars may be provided with a mark to distinguish them from the upper main bars. For example, the reinforcing main bars may be provided with yellow tape on both ends in the longitudinal direction. In this case, the constructor can recognize that the reinforcing main bars are provided in the deck plate assembly. [Explanation of symbols]

[0081] 1 Deck Plate Assembly 1A Deck Plate 2. Steel truss 5 Core beam 10 Upper main bar 20 Lower main bar 30 Lattice material 30a Lattice material 30b Lattice material 31 Yamabe 31a Yamabe 31b Mountain 32 Valley 32a Tanibe 32b Tanibe 33 First joint site 34 Second joint site 36 bending point 37 Legs 38 Slope 38D downward slope 38U upward slope 39 Attachment 40 Bottom plate part 41 Installation Area 41A Projection part 42 Reinforcing rib 45 Edge 45A First Edge 45B Second edge 81 Reinforcing bars 81A End 82 Main Reinforcement Support Bracket 82A Locking part 82B Concave part Column 82C 101 Deck plate assembly 101A Deck Plate 102 Steel Bar Truss 110 Upper main bar 120 Lower Main Bar 140 Bottom plate part 141A Projection part 142 Reinforcing rib 145 Edge 145A First Edge 145B Second edge 181 Reinforcing bars 182 Main Reinforcement Support Bracket 182A Locking part 182B Concave part C10 Concrete slab C10A Cover Thickness C10B Cover thickness C11 Concrete C20 Concrete slab C20A Cover Thickness C20B Cover thickness C21 Concrete L1 separation distance L5 separation distance L6 Working width L7 Working width L8 Dimension L9 Dimension L10 interval θ1 angle θ2 angle θ5 angle θ6 Angle

Claims

1. A deck plate having two sets of reinforcing bar trusses each including an upper main bar extending linearly, two lower main bars extending linearly below the upper main bar in parallel and spaced apart from each other, and a pair of wavy lattice members each having a repeating peak and valley along the length of the upper main bar, the reinforcing bar trusses being integrated with a bottom plate portion as a structural material used for a concrete slab, and being hung across a structural beam of a building in a state where they are aligned in the width direction of the bottom plate portion, The bottom plate portion is On the plate surface of the bottom plate portion, two installation areas are extended in a band shape along the longitudinal direction, and one set of the reinforcing bar truss is installed in each of the installation areas; A first edge portion extending along one edge of the bottom plate portion in the width direction; a second edge portion extending along the other edge of the bottom plate portion in the width direction and configured to be connectable to the first edge portion; The two installation areas are set so that the separation distance between the upper main reinforcements in the reinforcing bar trusses installed in each area is 250 mm, A deck plate assembly is constructed by connecting a plurality of deck plates to each other at the first edge portion of one of the deck plates and the second edge portion of the other deck plates, the deck plates being connected in the width direction with a working width of 500 mm, A plurality of main reinforcement support brackets are arranged in a direction intersecting the length direction from above each of the upper main reinforcements of each of the reinforcing bar trusses arranged in the width direction; A reinforcing main bar having the same diameter as the upper main bar and extending linearly in parallel to the side of the upper main bar; Each of the main reinforcement support brackets is a locking portion that is locked to at least one of the upper main reinforcements in the intersecting direction to position the main reinforcement support bracket in the width direction; a concave portion provided in a downwardly recessed state in the center between two adjacent upper main reinforcements in the row of the upper main reinforcements, The respective concave portions are arranged in a row in the longitudinal direction by arranging the respective main reinforcing bar support fittings in a row in the longitudinal direction, The reinforcing main bars are fitted into the row of recesses from above, so that their vertical heights as viewed from the bottom plate are aligned with those of the upper main bars. Deck plate assembly.

2. 2. The deck plate assembly of claim 1, At least one reinforcing rib is provided on the plate surface of the bottom plate portion of the deck plate between the two installation areas and extending along the length direction. Deck plate assembly.

3. 3. The deck plate assembly according to claim 1 or 2, The recessed portion is formed to a size that allows two reinforcing bars having the same diameter as the upper main bar to be arranged side by side in the width direction. Deck plate assembly.

Images