JP2015031137A - Deck plate structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deck plate structure capable of firmly fixing a reinforcement truss to an upper surface of a metal deck, and capable of constructing a slab having sufficient strength.SOLUTION: A deck plate structure 10A comprises a presser projection 31 and a residual part 32 except for the presser projection 31 in which an upper end projection 27 of lattice bars 26a and 26b of a reinforcement truss 12 is welded to an upper end reinforcement 24, and an intermediate part 28 of the lattice bars 26a and 26b is welded to lower end reinforcements 25a and 25b, and a fixed reinforcement 13 projects above a lower end recess 29 of the lattice bars 26a and 26b. The presser projection 31 is arranged in the lower end recess 29 of the lattice bars 26a and 26b, the residual part 32 is welded to welding projections 18a and 18b of a metal deck 11, the lower end recess 29 of the lattice bars 26a and 26b is sandwiched by the metal deck 11 and the presser projection 31, and the reinforcement truss 12 is firmly fixed to an upper surface 16 of the metal deck 11.

Description

  The present invention relates to a deck plate structure used to construct a slab of a steel structure building or a reinforced concrete structure.

  It is formed from a steel plate of a predetermined area that has been plated and a plurality of reinforcing bars trusses installed on the upper surface of the steel plate. It is bridged between horizontal beams, and ordinary concrete or lightweight concrete is cast to form a steel structure or reinforced concrete. A deck plate structure for constructing a slab of a building is disclosed (see Patent Document 1). The reinforcing bar truss is an upper end bar that is spaced upward from the upper surface of the iron plate and extends in the vertical direction, a lower end bar that is positioned between the iron plate and the upper bar, and extends in the vertical direction, and a vertical direction between the iron plate and the upper bar. It is formed from latticed muscles extending in the front-rear direction while repeating undulations.

  In this deck plate structure, spot welding is performed on the upper end muscle in a state where the upper end of the lattice is in contact with the upper end, and spot welding is performed on the lower end in a state where the intermediate portion of the lattice is in contact with the lower end. . The lower end of the lattice line is spot welded to the iron plate while being bent laterally outward so as to be parallel to the upper surface of the iron plate.

JP 2007-170161 A

  In the deck plate structure disclosed in the above publication, an automatic welding machine including an electrode and a moving mechanism is used to spot weld the lower end of the lattice to the iron plate. As an example of welding by an automatic welder, the electrode is located above the lower end of the lattice, the electrode is located below the lower surface of the iron plate, the electrode descends toward the lower end of the lattice, The electrodes rise toward the lower surface of the iron plate, and while pressing the lower end portion of the lattice and the iron plate by the electrodes, the lower end portion and the iron plate are sandwiched, and at the same time, a predetermined current flows through the electrodes. The current flowing from the electrode instantaneously melts the lower end of the lattice and the iron plate, and they are welded together.

  In this deck plate structure, welding between the lower end of the lattice bars and the iron plate proceeds from time to time in the front-rear direction of the deck plate structure from the rear to the rear, but the lattice bars and the iron plate are welded while being pressed by the electrodes. The welded lattice may be distorted toward the upper surface of the iron plate, so that the lower end of the pre-welded lattice located behind the welded lattice may float from the upper surface of the iron plate and be welded later. The lower end of the lattice bar is spaced upward from the steel plate, the lower end of the lattice bar cannot be sufficiently welded to the iron plate, and the rebar truss and iron plate are unintentionally released due to unwelding or insufficient welding May end up.

  When the rebar truss (lower end of the lattice bar) and the steel plate are released, the concrete, the steel plate, and the rebar truss cannot form a reinforced concrete structure even if concrete is placed on the deck plate structure. When bending tensile force, bending compressive force, or shearing force is applied to concrete, cracks may occur in the concrete due to these forces, and a slab having insufficient strength may be constructed.

  Further, when the lower end portion of the lattice is directly welded to the upper surface of the iron plate, the heat effect during welding causes not only the upper surface of the iron plate but also the lower surface of the iron plate to be marked by welding. In addition to damaging the appearance of the deck plate structure, the weld marks on the bottom surface of the iron plate will dissipate the plating applied to prevent corrosion and expose the iron, so if the weld marks rust due to moisture or condensation There is.

  An object of the present invention is to provide a deck plate structure capable of firmly fixing a lattice bar forming a reinforcing bar truss to the upper surface of a metal deck and constructing a slab having sufficient strength. Another object of the present invention is to provide a deck plate structure that does not cause welding marks on the lower surface of the metal deck and can prevent the occurrence of rust on the lower surface of the metal deck.

  The premise of the present invention to solve the above problems is a deck plate structure for constructing a slab having a predetermined area.

  The feature of the present invention in the above premise is that the deck plate structure is provided on a metal deck having a predetermined area having both side edges extending in the front-rear direction and both end edges extending in the lateral direction, and installed on the upper surface of the metal deck in the front-rear direction. A reinforcing bar truss that extends and a fixing bar that is located on the top surface of the metal deck and extends in the lateral direction and is spaced apart by a predetermined distance in the front-rear direction. The metal deck protrudes upward from the top surface in the front-rear direction. It has welding projections that extend and are spaced apart by a predetermined distance in the lateral direction, and the reinforcing bar truss is located between the pair of welding projections that are arranged in the lateral direction and is located above the upper surface of the metal deck in the longitudinal direction. A pair of lower end bars extending between the pair of welding projections and extending between the pair of welding projections and the metal deck; Waves up and down between the top muscles It is formed from a pair of lattice muscles extending in the front-rear direction while repeating proneness, and these lattice muscles are in contact with the upper end muscle and bent into a convex shape from the upper end convex portion that is bent into a concave shape while contacting the upper surface of the metal deck. The upper end convex part of these lattices is welded to the upper end, the middle part of these lattices is welded to the lower end, and the fixed part is the lower end recess of these lattices. A pressing convex portion that is convex upward and a remaining portion excluding the pressing convex portion, and the pressing convex portion of the fixed muscle is arranged in the lower end concave portion of these lattice bars, and the residual portion of the fixing bar is the metal deck It is arrange | positioned at the welding convex part of this, and is welded to the welding convex part, and there exists in the lower end recessed part of these lattice stripes being pinched | interposed into the upper surface and presser convex part of a metal deck.

  As an example of the deck plate structure according to the present invention, the lattice is made of a metal rod having a circular cross section, and the diameter of the lattice is substantially the same as or slightly larger than the height of the weld projection from the top surface of the metal deck. In the deck plate structure, when the fixing bars are arranged in the welding convex part and the lower end concave part, the remaining part of the fixing bar comes into contact with the top part of the welding convex part.

  As another example of the deck plate structure according to the present invention, the fixing bar is made of a metal bar having a circular cross section, and in the deck plate structure, the fixing bar is fixed when the fixing bar is arranged in the welding convex part and the lower end concave part. The pressing convex portion of the line abuts the lower end recessed portion while tilting forward or backward in the longitudinal direction at the lower end recessed portion of the lattice muscle.

  As another example of the deck plate structure according to the present invention, the pressing protrusions of the fixing bars are a pair of standing parts extending upward, and a horizontal line extending between the standing parts and straddling the lower end recessed parts of the lattice bars. In the deck plate structure, when the fixing bars are arranged in the welding convex part and the lower end concave part, the standing part and the horizontal part are either the front or rear in the front-rear direction in the lower end concave part of the lattice line. It tilts to one side, and the horizontal part contacts the lower end recess of the lattice muscle.

  As another example of the deck plate structure according to the present invention, in the deck plate structure, when the fixing bars are arranged in the welding convex part and the lower end concave part, the pressing convex part of the fixing bar is positioned in the lower end concave part of the lattice bar. Thus, the lower end recess is bent into a substantially V shape.

  As another example of the deck plate structure according to the present invention, the fixing bar is made of a metal bar having a circular cross section, and in the deck plate structure, the fixing bar is fixed when the fixing bar is arranged in the welding convex part and the lower end concave part. The pressing convex portion is bent into a substantially inverted V shape so that the streak is positioned at the lower end concave portion of the lattice, and the lower protruding portion is bent into a substantially V shape, and is bent into a substantially inverted V shape. Is in contact with the lower end recess while tilting forward or backward in the front-rear direction at the lower end recess bent in a substantially V shape.

  As another example of the deck plate structure according to the present invention, the lower end bars are positioned outside the lattice bars and positioned inside the pair of weld projections, and the lower end recesses of one lattice bar are the pair of welds. Located on the inside of one welding projection of the projections, the lower end recess of the other lattice is located on the inside of the other welding projection of the pair of welding projections, and welds the remaining portion of the fixed reinforcement The convex part is welded by spot welding.

  As another example of the deck plate structure according to the present invention, one welding convex portion of the pair of welding convex portions is laterally outward of the lower end concave portion of one lattice line and adjacent to the immediate vicinity of the lower end concave portion. And the other welding convex part of a pair of welding convex part is the lateral direction outward of the lower end recessed part of the other lattice, and is adjoining in the immediate vicinity of a lower end recessed part.

  As another example of the deck plate structure according to the present invention, one side edge portion of the metal deck is bent downward from the deck to form a first engagement portion, and the other side edge portion of the metal deck is the deck. The second engaging portion that is bent upward is formed to engage with the first engaging portion, and the other side edge portion of the metal deck that extends in the vicinity of the second engaging portion is welded. It is bent downward from the convex part toward the upper surface of the metal deck.

  As another example of the deck plate structure according to the present invention, in the deck plate structure, the reinforcing bars trusses are arranged at a predetermined distance in the horizontal direction and are pressed between the reinforcing bars trusses adjacent in the horizontal direction. A void extending in the front-rear direction is provided in the remaining portion extending between the two.

  According to the deck plate structure according to the present invention, the pressing protrusions of the fixing bars are arranged in the lower end recesses of the lattice bars, and the remaining parts of the fixing bars are welded to the welding protrusions formed on the metal deck. Since the bottom recess of the bar is sandwiched between the upper surface of the metal deck and the pressing convex part, thereby the lattice bars forming the reinforcing bar truss are fixed to the upper surface of the metal deck, the reinforcing bar truss is firmly fixed to the upper surface of the metal deck. The fixing of the reinforcing bar truss and the metal deck is not inadvertently released. As for the deck plate structure, when concrete is placed on it, the concrete, metal deck, reinforced truss and fixed reinforcement form a reinforced concrete structure, and bending tensile force, bending compressive force and shearing force act on the concrete. However, cracks are not generated in the concrete by those forces, and a slab having sufficient strength can be constructed using the deck plate structure. In the deck plate structure, the remaining part of the fixed bar is welded to the convex part made in the metal deck, the lower end concave part of the lattice bar only abuts the upper surface of the metal deck, and the lower end concave part is welded to the metal deck. Therefore, the appearance of the metal deck is not spoiled, and no weld marks are formed on the lower surface of the metal deck, and the occurrence of rust on the lower surface of the metal deck can be prevented.

  The lattice bars are made of a metal rod with a circular cross section, the diameter of the lattice bars is approximately the same as or slightly larger than the height of the weld protrusion from the top surface of the metal deck, and the fixed bars are placed on the weld protrusion and the bottom recess. When the deck plate structure has a fixed reinforcing bar remaining on the top of the welding convex part, the remaining part of the fixing bar always comes into contact with the top of the welding convex part. Lattice bars that form a reinforcing bar truss can be fixed to the top surface of the metal deck by fixing the bottom recesses of the lattice bars between the top surface of the metal deck and the pressing protrusions of the fixed bars. The rebar truss can be firmly fixed to the upper surface of the metal deck. The deck plate structure does not inadvertently release the fixation between the reinforcing bar truss and the metal deck, and the concrete placed on the deck plate structure is securely reinforced by upper and lower bars, lattice bars, and fixing bars. Even if a concrete, metal deck, reinforced truss, and fixed reinforcement form a reinforced concrete structure, and bending tensile force, bending compression force, and shearing force are applied to the concrete, they will not cause cracks in the concrete. A slab having a sufficient strength can be constructed using the deck plate structure.

  When the fixing bar is made of a metal bar having a circular cross section, and the fixing bar is placed on the welding convex part and the lower end concave part, the holding convex part of the fixing bar is either the front or rear in the front-rear direction at the lower end concave part of the lattice bar. In the deck plate structure that is tilted to one side and abuts the lower end recess, the presser protrusion of the fixed muscle tilts to the front or rear in the front-rear direction at the lower end recess of the lattice muscle, so that the presser protrusion is at the lower end. Since it always comes into contact with the recess, when the remaining part of the fixing bar is welded and fixed to the welding convex part, the lower end concave part of these lattices is firmly fixed by the pressing convex part, and inadvertent play in the metal deck of the lattice bar This can prevent the reinforcing bar truss from being fixed to the upper surface of the metal deck. The deck plate structure does not inadvertently release the fixation between the reinforcing bar truss and the metal deck, and the concrete placed on the deck plate structure is securely reinforced by upper and lower bars, lattice bars, and fixing bars. Even if a concrete, metal deck, reinforced truss, and fixed reinforcement form a reinforced concrete structure, and bending tensile force, bending compression force, and shearing force are applied to the concrete, they will not cause cracks in the concrete. A slab having a sufficient strength can be constructed using the deck plate structure.

  The fixing protrusion of the fixing bar has a pair of standing parts extending upward and a horizontal part extending between the standing parts and straddling the lower end recesses of the lattice bars, and the fixing bars are welded and lower end recesses. When the deck plate structure is placed, the upright part and the horizontal part incline toward the front or back in the front-rear direction at the bottom recess of the lattice, and the horizontal part abuts the bottom recess of the lattice. The horizontal part of the holding convex part always comes into contact with the lower part concave part by tilting the standing part and the horizontal part of the convex part to either the front or back in the front-rear direction at the lower part concave part of the lattice muscle. When the remaining part is welded and fixed to the welding convex part, the lower end concave part of these lattice bars is firmly fixed by the horizontal part of the pressing convex part, and it is possible to prevent inadvertent play in the metal deck of the lattice bars, Las can be reliably fixed to the upper surface of the metal deck.

  The deck plate structure in which the lower end recess is bent in a substantially V shape so that the pressing protrusion of the fixing bar is located in the lower end recess of the lattice when the fixing bars are arranged on the welding protrusion and the lower end recess. By bending the bottom recess of the lattice line into a substantially V shape, when the pressing projection of the fixed muscle is disposed in the bottom recess of the lattice, the pressing projection is forward and backward in the front and rear direction at the bottom recess of the lattice. Since the pressing convex part is positioned in the lower end concave part while tilting to either one of them, it is possible to prevent the movement of the fixing bar in the front-rear direction and the lateral direction, and the remaining part of the fixing bar is reliably welded to the welding convex part. Can be fixed. Since the deck plate structure can reliably weld and fix the remaining part of the fixing bar to the welding convex part, the lower end concave part of these lattice bars is sandwiched between the upper surface of the metal deck and the pressing convex part of the fixing bar, and the reinforcing bar The lattice bars forming the truss can be firmly fixed to the upper surface of the metal deck, and the reinforcing bar truss can be securely fixed to the upper surface of the metal deck.

  When the fixing bar is made of a metal rod having a circular cross section, and the fixing bar is arranged on the welding convex part and the lower end concave part, the pressing convex part is substantially inverted V-shaped so that the fixing bar is located at the lower end concave part of the lattice line. Either the front or back in the front-rear direction at the bottom recess where the bottom protrusion is bent into a substantially V shape and the holding protrusion that is bent into a substantially inverted V shape is bent into a substantially V shape. The deck plate structure that is tilted to one side and abuts the lower end concave portion has a pressing convex portion bent in a substantially inverted V shape of the fixing bar and a front portion in the front-rear direction in the lower end concave portion bent in a substantially V shape of the lattice line. By tilting to either one of the rear side, the pressing convex part always comes into contact with the lower end concave part. Therefore, when the remaining part of the fixing bar is welded and fixed to the welding convex part, the lower end concave part of these lattice muscles by the pressing convex part Is firmly fixed It is possible to prevent inadvertent floating in the metal deck lattice muscle, rebar trusses can be reliably fixed to the upper surface of the metal deck. The deck plate structure does not inadvertently release the fixation between the reinforcing bar truss and the metal deck, and the concrete placed on the deck plate structure is securely reinforced by upper and lower bars, lattice bars, and fixing bars. Even if a concrete, metal deck, reinforced truss, and fixed reinforcement form a reinforced concrete structure, and bending tensile force, bending compression force, and shearing force are applied to the concrete, they will not cause cracks in the concrete. A slab having a sufficient strength can be constructed using the deck plate structure.

  These lower end bars are located outside the lattice lines and located inside the pair of weld convex parts, and the lower end concave parts of one lattice line are located inside the one weld convex part of the pair of weld convex parts, The deck plate structure in which the lower end concave portion of the other lattice bar is located inside the other weld convex portion of the pair of weld convex portions, and the remaining portion of the fixing bar and the weld convex portion are welded by spot welding. In spot welding of the remaining part of the fixed bar and the welding convex part, welding is performed by placing electrodes on the upper side of the fixed bar and below the welding convex part and pressing them with the electrodes to sandwich the residual part of the bar and the welding convex part. However, since the bottom stripes are located inside the welding projections, the bottom stripes do not interfere with the electrodes, and it is easy to weld the pushing stripes and the welding projections with these electrodes, The remaining part of the fixing bar and the welding projection are It can be quite welded. Since the deck plate structure can reliably weld and fix the remaining part of the fixing bar to the welding convex part, the lower end concave part of these lattice bars is sandwiched between the upper surface of the metal deck and the pressing convex part of the fixing bar, and the reinforcing bar The lattice bars forming the truss can be firmly fixed to the upper surface of the metal deck, and the reinforcing bar truss can be securely fixed to the upper surface of the metal deck.

  One welding projection of the pair of welding projections is laterally outward of the bottom recess of one lattice and adjacent to the bottom recess, and the other welding projection of the pair of welding projections The deck plate structure which is laterally outward of the lower end recess of the other lattice bar and adjacent to the immediate vicinity of the lower end recess is a welding convex portion where the remaining portion of the fixing bar is adjacent to the lower end recess of the lattice line. The horizontal dimension of the fixing bars extending between the pair of welding protrusions can be minimized by welding and fixing to the upper surface of the metal deck by the pressing protrusions. It is firmly fixed and the rebar truss can be firmly fixed to the upper surface of the metal deck without loosening.

  One side edge portion of the metal deck is bent downward to form a first engagement portion, and the other side edge portion of the metal deck is bent upward to engage the first engagement portion. Deck plate structure in which the remaining portion of the fixing bar which is the other side edge portion of the metal deck and extends in the vicinity of the second engaging portion is bent downward from the weld convex portion toward the upper surface of the metal deck. If the remaining portion of the fixing bar extending in the vicinity of the second engaging portion is not bent toward the upper surface of the metal deck and extends straight, the first engaging portion of the metal deck is connected to the second engaging portion. When engaging the joint portion, the remaining portions of the fixing bars obstruct the engagement of the engagement portions, and the engagement portions cannot be smoothly engaged, but extend near the second engagement portion. Since the remaining part of the fixing bar is bent downward toward the top surface of the metal deck, The remaining portions of the lines do not obstruct the engagement of the engagement portions, and the engagement portions can be smoothly engaged, and a deck having a predetermined area can be obtained by connecting a plurality of deck plate structures in the lateral direction. An assembly of plate structures can be easily made.

  A deck plate structure in which the reinforcing bar trusses are arranged at a predetermined distance in the lateral direction, and a void extending in the front-rear direction is installed between the reinforcing bar trusses adjacent in the lateral direction and extending between the pressing projections. Since voids are used instead of concrete, it is not necessary to place concrete in the entire area of the deck plate structure, and it is possible to save the void volume of concrete, reducing the labor and time for that amount. And can reduce the cost of slab construction. Compared with the case where only concrete is placed on the deck plate structure, the void volume of concrete can be omitted, so the weight of the slab can be reduced, and it is applied to steel structures and reinforced concrete structures. The load can be reduced.

The perspective view of the deck plate structure shown as an example. The top view of a deck plate structure. The front view of a deck plate structure. The partial enlarged front view which expands and shows the lower end recessed part of a fixed muscle and a lattice muscle. The partial side view of the deck plate structure A. FIG. The partial expanded side view which expands and shows a fixed muscle and the lower end recessed part of a lattice muscle. The front view of a fixed muscle. The elements on larger scale of the fixed reinforcement and welding convex part shown in the state before spot welding. The elements on larger scale of the fixed reinforcement and the welding convex part shown in the state after spot welding. The perspective view of the deck plate structure shown as another example. The front view of a deck plate structure. The partial enlarged front view which expands and shows the lower end recessed part of a fixed muscle and a lattice muscle. The front view of a fixed muscle. The top view of the deck plate structure shown as another example. The front view of a deck plate structure. The partial side view of a deck plate structure.

  Details of the deck plate structure according to the present invention will be described below with reference to the accompanying drawings such as FIG. 1 which is a perspective view of the deck plate structure 10A shown as an example. 2 is a top view of the deck plate structure 10A, and FIG. 3 is a front view of the deck plate structure 10A. FIG. 4 is a partially enlarged front view showing the fixed muscle 13 and the lower end recess 29 of the lattice muscle 26a, 26b in an enlarged manner, and FIG. 5 is a partial side view of the deck plate structure 10A. FIG. 6 is a partially enlarged side view showing the fixed muscle 13 and the lower end recessed portion 29 of the lattice muscles 26 a and 26 b in an enlarged manner, and FIG. 7 is a front view of the fixed muscle 13. FIG. 8 is a partially enlarged view of the fixing bar 13 and the welding projections 18a and 18b shown in a state before spot welding, and FIG. 9 shows the fixing bar 13 and the welding projection 18a shown in a state after spot welding. , 18b. 1-3, the front-rear direction is indicated by an arrow A (excluding FIG. 3), the lateral direction is indicated by an arrow B, and the up-down direction is indicated by an arrow C (excluding FIG. 2).

  The deck plate structure 10A includes a metal deck 11 having a predetermined area that is long in the front-rear direction, a plurality of reinforcing bars truss 12 that are arranged on the metal deck 11 and arranged in the lateral direction, and are arranged on the metal deck 11 in the front-rear direction. It is made of a plurality of fixed muscles 13 (lateral muscles) arranged at intervals. The deck plate structure 10A is used to construct a slab (not shown) such as a floor slab, a ceiling slab, or a roof slab having a predetermined area.

  The metal deck 11 has both side edge portions 14a and 14b extending in the front-rear direction and both end edge portions 15a and 15b extending in the horizontal direction, and has a substantially flat upper surface 16 and lower surface 17. An iron plate is used for the metal deck 11, and the upper and lower surfaces 16 and 17 are plated. A printed metal plate can be used as the metal deck 11. On the lower surface 17 of the printed metal plate, predetermined designs (not shown) such as various patterns used for the floor and various patterns used for the ceiling are printed (printed).

  The metal deck 11 is formed with a plurality of welding projections 18a and 18b that protrude upward from the upper surface 16 and extend in the front-rear direction. These welding convex portions 18a and 18b are arranged with a predetermined distance in the lateral direction. The welding projections 18a and 18b are a pair of both side portions 19 extending substantially straight upward from the upper surface 16 of the metal deck 11 and spaced apart by a predetermined dimension in the lateral direction, and top portions extending substantially horizontally between the both side portions 19. (See FIGS. 8 and 9). A space in which an electrode described later is located is formed between both side portions 19. The top portion 20 is formed with a welding projection 21 which is located at the center and protrudes upward.

  A first hook 22 (first engagement portion) is formed on one side edge portion 14a of the metal deck 11, and a second hook 23 (second engagement portion) is formed on the other side edge portion 14b. It has been. The first hook 22 bends one side edge 14a of the metal deck 11 upward from the upper surface 16 of the deck 11, and then further lowers the side edge 14a from the lower surface 17 of the deck 11 in the lateral direction. It is made from bending towards. The second hook 23 is formed by bending the other side edge portion 14b of the metal deck 11 upward from the upper surface 16 of the deck 11 and inward in the lateral direction.

  Each metal deck 11 hooks the second hook 23 of the other metal deck 11 on the first hook 22 of the one metal deck 11, and engages the hooks 22, 23 with each other, so that each metal deck 11 is placed sideways. It can be connected in the direction and can be arranged in the horizontal direction in a state where a plurality of metal decks 11 are connected. The area of the metal deck 11 is not particularly limited, and the area can be freely changed.

  These rebar trusses 12 are arranged on the upper surface 16 of the metal deck 11 and between the welding projections 18a, 18b formed on the deck 11, and extend in parallel in the front-rear direction. In the deck plate structure 10 </ b> A, two steel truss 12 are installed on the metal deck 11, but the number of trusses 12 installed on the deck 11 is not particularly limited, and the area of the deck 11 and the size of the truss 12 are not limited. Accordingly, the number of trusses 12 to be installed on the deck 11 can be freely determined.

  The reinforcing bar trusses 12 are assembled from one upper bar 24, two (a pair) lower bars 25a and 25b, and two (a pair) lattice bars 26a and 26b. The upper end bars 24 are iron bars having a circular cross section made by extending iron, but deformed iron bars having nodes (ribs) on their peripheral surfaces can also be used. The upper end line 24 is located between the pair of welding convex portions 18a and 18b arranged in the lateral direction, and extends straightly in the front-rear direction with a predetermined distance from the upper surface 16 of the metal deck 11. The upper end stripes 24 are arranged with a predetermined distance in the lateral direction and extend in parallel with each other. The longitudinal lengths of the upper end bars 24 arranged in the horizontal direction in the reinforcing bar trusses 12 are the same, and the distance between the upper end bars 24 upward from the upper surface 16 of the metal deck 11 is the same.

  The lower end bars 25a and 25b are iron bars having a circular cross section made by extending iron, but deformed iron bars having nodes (ribs) on their peripheral surfaces can also be used. The lower end stripes 25a and 25b are positioned between the pair of welding projections 18a and 18b arranged in the lateral direction (positioned apart from the welding projections 18a and 18b by a predetermined dimension), and the lattice stripes 26a and 26b It is located outside and below the upper end stripe 24 and on both lateral sides of the upper end stripe 24.

  These lower end stripes 25a and 25b are spaced apart from the upper surface 16 of the metal deck 11 by a predetermined distance and extend straight in the front-rear direction. These lower end bars 25a and 25b are arranged with a predetermined distance in the lateral direction and extend in parallel with each other. In each rebar truss 12, the length dimensions in the front-rear direction of the lower end bars 25a, 25b arranged in the horizontal direction are the same, and the distance between the lower end bars 25a, 25b upward from the upper surface 16 of the metal deck 11 is the same. .

  The lattice bars 26a and 26b are iron bars having a circular cross section made by extending iron. The lattice bars 26a and 26b are positioned between the pair of welding projections 18a and 18b arranged in the lateral direction (positioned apart from the welding projections 18a and 18b by a predetermined dimension), and the metal deck 11 and the top bar 24, and extends in the front-rear direction while repeating undulations (bending) in the up-down direction.

  The lattice stripes 26 a and 26 b extend between the upper end convex portion 27 located on the upper end stripe 24 side, the lower end concave portion 29 located on the upper surface 16 side of the metal deck 11, and the upper end convex portion 27 and the lower end concave portion 29. And an intermediate portion 28. The lattice lines 26a and 26b have a diameter L1 substantially equal to or slightly larger than a height dimension L2 of the weld convex portion 16 (both side portions 19) from the upper surface 16 of the metal deck 11 (welded convex portions 18a and 18b (both side portions). 19) The height dimension L1 from the upper surface 16 of the metal deck 11 is substantially the same as or slightly smaller than the diameter L1 of the lattice muscles 26a, 26b). The diameter L1 of the lattice stripes 26a and 26b is in the range of 6 to 10 mm, and the height dimension L2 of the welding convex portion 16 (both side portions 19) from the upper surface 16 of the metal deck 11 is in the range of 3 to 7 mm.

  A pair of lattice bars 26 a and 26 b forming the reinforcing bar truss 12 are arranged symmetrically in the lateral direction with the upper end bars 24 interposed therebetween. Accordingly, the positions of the upper end convex portions 27 of the pair of lattice muscles 26a and 26b aligned in the horizontal direction are matched, the positions of the intermediate portions 28 are matched, and the positions of the lower end concave portions 29 are matched. Each lattice stripe 26a, 26b has the same separation distance between the upper-end convex portions 27 adjacent in the front-rear direction, the upper-end convex portions 27 are arranged at equal intervals in the vertical direction, and the separation dimension between the lower-end concave portions 29 adjacent in the front-rear direction. Equally, the lower end recesses 29 are arranged at equal intervals in the front-rear direction. Moreover, the height dimension from the lower end recessed part 29 of each lattice muscle 26a, 26b to the upper end convex part 27 is substantially the same.

  As shown in FIG. 3, the lattice lines 26 a and 26 b are inclined at a predetermined angle with respect to the metal deck 11, and widen outwardly from the upper end convex portion 27 toward the lower end concave portion 29. In addition, there is no limitation in particular about the inclination angle of lattice muscle 26a, 26b, and if it is located between a pair of welding convex parts 18a, 18b (it is located inside these welding convex parts 18a, 18b), the inclination angle can be freely set. Can be changed. The upper end convex portions 27 of the lattice stripes 26a and 26b are bent in a substantially inverted V shape so as to be convex upward (convex shape) in the vertical direction. The upper end convex portion 27 is in contact with the peripheral surface of the upper end stripe 24, and a portion (intersection) of the upper end convex portion 27 that intersects with the upper end stripe 24 is welded (fixed) to the upper end stripe 24 by spot welding.

  The intermediate portion 28 of the lattice bars 26a, 26b is located inside the lower end bars 25a, 25b, and the portion (intersection) of the intermediate portion 28 that intersects the lower end bars 25a, 25b is spot-welded to the lower end bars 25a, 25b. Is welded (fixed). The lower end concave portions 29 of the lattice stripes 26a and 26b are bent in a substantially V shape so as to be concave (concave shape) downward in the vertical direction. A bottom portion 30 of the lower end recess 29 is in contact with the upper surface 16 of the metal deck 11.

  The lower end recess 29 of one lattice line 26a has a bottom portion 30 on the inside of one welding projection 18a and adjacent to the projection 18a, and the lower end recess 29 of the other lattice line 26b has its bottom. The portion 30 is adjacent to the inner side of the other welding projection 18b and in the immediate vicinity of the projection 18b. In other words, one welding projection 18a of the pair of welding projections 18a, 18b is laterally outward of the lower end recess 29 of one lattice line 26a and is adjacent to the nearest to the lower end recess 29. The other welding projection 18b of the other welding projections 18a and 18b is laterally outward of the lower end recess 29 of the other lattice 26b and is adjacent to the lower end recess 29. The bottom portion 30 of the lower end recess 29 has a curvature that is substantially the same as the curvature of the fixed muscle 13 or a slightly larger curvature than the curvature of the fixed muscle 13.

  The angle at which each lattice muscle 26a, 26b is bent in a wave shape in the vertical direction is constant, and the number of times the lattice muscles 26a, 26b are bent per unit length (for example, 1 m) is the same. Note that the angle at which the lattices 26a, 26b repeat the bending in the vertical direction can be freely changed, and the angle can be adjusted (the number of repetitions of the bending of the lattices 26a, 26b per unit length). Thus, it is possible to freely adjust the vertical separation dimension between the upper end convex portions 27 of the lattice muscles 26a and 26b, and to freely adjust the vertical separation dimension between the lower end concave portions 29 of the lattice muscles 26a and 26b. Can do.

  In spot welding of the upper end stripe 24 and the upper end convex portions 27 of the lattice stripes 26a and 26b, although not shown, an automatic welding machine having an electrode and a moving mechanism is used. In an example of welding by an automatic welder, the upper end stripe 24 and the upper end convex portion 27 are sandwiched between the electrodes while pressing the upper end stripe 24 and the upper end convex portion 27 with each electrode. At the same time that the upper end stripe 24 and the upper end convex portion 27 are sandwiched by the electrodes, a predetermined value of current is passed through the electrodes (a predetermined value of voltage is applied). The current flowing from these electrodes flows to the upper end stripe 24 and the upper end convex portion 27, and heats and melts the upper end stripe 24 and the upper end convex portion 27. When these electrodes are separated from the upper end stripe 24 and the upper end projection 27, the upper end stripe 24 and the upper end projection 27 are cooled and solidified, and they are welded.

  In spot welding of the lower end bars 25a, 25b and the intermediate part 28 of the lattice bars 26a, 26b, the lower end bars 25a, 25b and the intermediate part 28 are pressed by each electrode, and the lower end bars 25a, 25b and the intermediate part 28 are pressed by these electrodes. Between. At the same time that the lower end bars 25a and 25b and the intermediate portion 28 are sandwiched by the electrodes, a predetermined current is supplied to the electrodes (a predetermined voltage is applied). The currents flowing from these electrodes flow to the lower end bars 25a and 25b and the intermediate part 28, and the lower end bars 25a and 25b and the intermediate part 27 are heated and melted. When these electrodes are separated from the lower end bars 25a and 25b and the intermediate part 28, the lower end bars 25a and 25b and the intermediate part 27 are cooled and solidified, and they are welded.

  The fixing bars 13 are iron bars having a circular cross section made by extending iron and are located on the upper surface 16 of the metal deck 11 and extend in the lateral direction. In addition, the length dimension of the horizontal direction of these fixed bars 13 is the same. The fixed bar 13 has a pressing convex part 31 that protrudes upward from the lower end concave part 29 of the lattice bars 26 a and 26 b, and a remaining part 32 excluding the pressing convex part 31. The remaining portion 32 is located between the pressing projections 31 and extends in a straight line in the lateral direction. The pressing convex portion 31 of the fixing bar 13 is positioned between the first standing portion 33a (standing portion) that is located on the welding convex portions 18a and 18b and extends upward, and the lower end concave portion 29 of the lattice bars 26a and 26b. A second standing portion 33b (standing portion) extending upward, and a horizontal portion 34 extending between the standing portions 33a and 33b and straddling the lower end recess 29 of the lattice muscles 26a and 26b. The shape is formed into an isosceles trapezoidal shape. The height L3 of the standing portions 33a and 33b is in the range of 8 to 12 mm.

  The pressing protrusion 31 of the fixed bar 13 has a horizontal part 34 disposed on the bottom part 30 of the lower end recess 29 of the lattice bars 26a, 26b. The pressing convex portion 31 is in contact (contact) with the lower end concave portion 29 while being tilted to either the front or rear in the front-rear direction and the rear in the front-rear direction at the lower end concave portion 29 of the lattice muscles 26a and 26b. The remaining portion 32 of the fixing bar 13 is disposed on the welding convex portions 18a and 18b. The remaining portion 32 extends to both side edge portions 14a and 14b of the metal deck 11 and extends between the lower end concave portions 29 of the lattice lines 26a and 26b. Among the remaining portions 32, the remaining portion 32 which is the other side edge portion 14 b of the metal deck 11 and extends in the vicinity of the second hook 23 is bent downward from the welding convex portions 18 a and 18 b toward the upper surface 16 of the metal deck 11. Is inclined downward.

  If the pressing protrusion 31 of the fixing bar 13 is disposed on the bottom portion 30 of the lower end recess 29 before spot welding the remaining portion 32 of the fixing bar 13 to the welding protrusions 18a and 18b, the pressing protrusion 31 (first And the second upright portions 33 a and 33 b and the horizontal portion 34) fall down in the front portion in the front-rear direction or the rear portion in the front-rear direction at the bottom portion 30 of the lower-end recess 29, and the pressing protrusion 31 of the fixed muscle 13 As shown in FIG. 8, the peripheral surface of the remaining portion 32 of the fixing bar 13 is placed on the welding protrusion 21 of the top portion 20 of the welding projections 18 a and 18 b formed on the metal deck 11 as shown in FIG. 8. Is done.

  As shown in FIG. 9, the remaining portion 32 of the fixing bar 13 is welded (fixed) to the top portion 20 of the welding projections 18a and 18b by spot welding. In the deck plate structure 10A, when the remaining portion 32 of the fixing bar 13 and the top portion 20 of the welding projections 18a and 18b are welded, the lower end recess 29 of the lattice bars 26a and 26b becomes the upper surface 16 of the metal deck 11 and the fixing bar. The lattice bars 26 a and 26 b (rebar truss 12) are firmly fixed to the upper surface 16 of the deck 11.

  In the spot welding between the remaining portion 32 of the fixing bar 13 and the top portion 20 of the welding projections 18a and 18b, one electrode is arranged above the remaining portion 32 and is formed on the metal deck 11, although not shown. The other electrode is disposed in the space between the side portions 19 of the welding projections 18a and 18b. The other electrode is in contact with the top portion 19 of the welding projections 18a, 18b. While lowering one electrode and pressing the peripheral surface of the remaining portion 32 of the fixing bar 13 downward with the electrode, the remaining portion 32 and the top portion 20 of the welding projections 18a and 18b are sandwiched by these electrodes. At the same time that the remaining portion 32 and the top portion 20 of the welding projections 18a and 18b are sandwiched by these electrodes, a predetermined value of current is applied to these electrodes (a voltage of a predetermined value is applied).

  The current flowing from these electrodes flows to the remaining portion 32 of the fixed bar 13 and the top portion 20 of the welding projections 18a and 18b, and the remaining portion 32 and the top portion 20 are heated and melted. When one electrode rises and one electrode separates from the remaining portion 32, the remaining portion 32 and the top portion 20 are cooled and solidified, and they are welded. At the time of welding between the fixing bar 13 and the welding projections 18 a and 18 b, the welding projection 21 formed on the top part 20 of the welding projections 18 a and 18 b is crushed and the entire top part 20 is the remainder of the fixing bar 13. It welds to the peripheral surface of the part 32, and the remaining part 32 of the fixed reinforcement 13 and the top part 20 of welding convex part 18a, 18b are fixed firmly.

  In the deck plate structure 10A, since the lower end stripes 25a and 25b are located inside the pair of welding convex portions 18a and 18b, the lower end stripes 25a and 25b do not interfere with the lowering and raising of the electrodes. With these electrodes, the remaining portion 32 of the fixing bar 13 and the top portion 20 of the welding projections 18a and 18b can be reliably welded and fixed. In addition, by making the welding projection 21 on the top portion 20 of the welding convex portions 18a and 18b, the remaining portion 32 of the fixing bar 13 and the top portion 20 of the welding convex portions 18a and 18b can be reliably brought into contact with each other. The top portion 20 of the convex portions 18a and 18b and the remaining portion 32 of the fixing bar 13 can be reliably brought into conduction through the projections 21 of the convex portions 18a and 18b, and the residual portion 32 and the top portion 20 are spot welded. Can be reliably welded.

  The thickness of the fixed muscle 13, the upper muscle 24, the lower muscle 25a, 25b, and the lattice muscle 26a, 26b is not particularly limited, and is necessary for the size and slab of the slab such as a floor slab, a ceiling slab, or a roof slab to be constructed. The thicknesses of the fixed muscle 13, the upper muscle 24, the lower muscles 25a and 25b, and the lattice muscles 26a and 26b can be freely changed according to the strength. The fixed bars 13, the upper end bars 24, the lower end bars 25a and 25b, and the lattice bars 26a and 26b are made of iron, but may be made of a metal other than iron. Further, when iron is used for the fixing bars 13, upper end bars 24, lower end bars 25a and 25b, and lattice bars 26a and 26b, they may be subjected to a rust prevention treatment such as plating.

  As an example of constructing a slab using the deck plate structure 10A, a plurality of deck plate structures 10A are formed by installing a reinforcing bar truss 12 and a fixing bar 13 on the upper surface 16 of the metal deck 11, The first hook 22 and the second hook 23 of the deck plate structure 10A are engaged with each other, and the deck plate structures 10A are connected in the lateral direction to form an aggregate of the deck plate structures 10A. Next, the aggregate | assembly of the connected deck plate structure 10A is arrange | positioned and fixed between the cross beams of a building. After the aggregate of the deck plate structure 10A is fixed between the cross beams of the building, concrete (not shown) is placed in a formwork (not shown) from above the metal deck 11, and the concrete is placed for a predetermined period. Take care. After the concrete curing period elapses, the formwork is removed, and slabs such as floor slabs, ceiling slabs, and roof slabs are completed.

  In addition, when placing concrete or placing the deck plate structure 10A between the cross beams of the building, a load is applied from the upper side to the lower side of the deck plate structure 10A, and the lower end concave portions 29 of the lattice bars 26a and 26b are formed. Even when trying to move outward in the lateral direction, the lower end concave portion 29 collides with the first standing portion 33a of the pressing convex portion 31, and the first standing portion 33a prevents further movement of the lower end concave portion 29. Further, when placing concrete or placing the deck plate structure 10A between the cross beams of the building, a load is applied to the deck plate structure 10A inward in the lateral direction, and the lower end recesses 29 of the lattice bars 26a and 26b are formed. Even when trying to move inward in the lateral direction, the lower end recessed portion 29 collides with the second standing portion 33b of the pressing projection 31 and the second standing portion 33b prevents further movement of the lower end recessed portion 29.

  In the deck plate structure 10A, the diameter L1 of the lattice bars 26a, 26b is substantially the same as or slightly larger than the height dimension L2 from the upper surface 16 of the metal deck 11 of the welding convex portions 18a, 18b (both side portions 19). Even if the fixed muscle 13 moves in the lateral direction when the pressing convex portion 31 of the muscle 13 is arranged on the bottom portion 30 of the lower end concave portion 29 of the lattice muscles 26a and 26b, the rising portion 33a of the pressing convex portion 31 is provided. , 33b abuts against the peripheral surface of the lower end recess 29 of the lattice muscle 26a, 26b, and further movement of the fixed muscle 13 is prevented, and the pressing convex portion 31 of the fixed muscle 13 is positioned at the bottom portion 30 of the lower end recess 29. At the same time, the remaining portion 32 of the fixing bar 13 is positioned on the top portion 20 of the welding projections 18a, 18b.

  In the deck plate structure 10A, since the pressing convex portion 31 of the fixed muscle 13 is positioned on the bottom portion 30 of the lower end concave portion 29, it is not necessary to separately position the fixed muscle 13 with respect to the lattice muscles 26a and 26b. The remaining portion 32 can be securely fixed to the top portion 20 of the welding projections 18a, 18b. In the deck plate structure 10A, the remaining portion 32 of the fixing bar 13 abuts on the top portion 20 of the welding projections 18a and 18b, and the remaining portion 32 can be securely fixed to the top portion 20 by welding. The lower end concave portions 29 of the metal deck 11 can be sandwiched between the upper surface 16 of the metal deck 11 and the pressing convex portion 31 of the fixing bar 13, and the lattice bars 26 a and 26 b (rebar truss 12) are securely fixed to the upper surface 16 of the deck 11. can do. Therefore, the rebar truss 12 does not move on the upper surface 16 of the deck 11 and the fixation between the metal deck 11 and the rebar truss 12 is not inadvertently released.

  In the deck plate structure 10A, one welding convex portion 18a is laterally outward of the lower end concave portion 29 of one lattice line 26a and is adjacent to the lower end concave portion 29, and the other welding convex portion 18b is the other lattice. The welding convex portion 18a, which is laterally outward of the lower end concave portion 29 of the line 26b and adjacent to the immediate vicinity of the lower end concave portion 29, and the remaining portion 32 of the fixing bar 13 is adjacent to the immediate vicinity of the lower end concave portion 29 of the lattice line 26a, 26b. Since it is welded and fixed to 18b, the lateral dimension of the fixing bar 13 extending between the pair of welding convex parts 18a and 18b is minimized, thereby pressing the lower end concave part 29 of the lattice bars 26a and 26b. 31 can firmly fix the upper surface 16 of the metal deck 11 without loosening, and the rebar truss 12 can be firmly fixed to the upper surface 16 of the deck 11 without loosening.

  In the deck plate structure 10A, when concrete is placed on the deck plate structure 10A, the concrete, the metal deck 11, the reinforcing bar truss 12, and the fixing bar 13 form a reinforced concrete structure, and bending tension, bending compressive force, and shearing force are applied to the concrete. Even if acted, cracks are not generated in the concrete by those forces, and a slab having sufficient strength can be constructed using the deck plate structure 10A.

  In the deck plate structure 10 </ b> A, the remaining portion 32 of the fixing bar 13 is welded to the welding convex portions 18 a and 18 b formed on the metal deck 11, and the lower end concave portion 29 of the lattice bars 26 a and 26 b contacts the upper surface 16 of the metal deck 11. Since the bottom end recess 29 is not directly welded to the deck 11, the aesthetic appearance of the deck 11 is not impaired, and a welding mark is not generated on the lower surface 17 of the deck 11. Generation of rust on the lower surface 17 can be prevented.

  When the remaining portion 32 of the fixing bar 13 extending in the vicinity of the second hook 23 is not inclined downwardly toward the upper surface 16 of the metal deck 11 from the welding projections 18a and 18b, but extends straight, the deck 11 When the first hook 22 is engaged with the second hook 23, the remaining portion 32 of the fixing bar 13 interferes with the engagement of the hooks 22, 23, and the hooks 22, 23 are smoothly engaged. However, in the deck plate structure 10A, the remaining portion 32 of the fixing bar 13 extending in the vicinity of the second hook 23 is bent downward from the welding convex portions 18a and 18b toward the upper surface 16 of the metal deck 11 so as to have a downward slope. Since it is inclined, the remaining portion 32 of the fixed muscle 13 does not interfere with the engagement of the hooks 22 and 23, and the hooks 22 and 23 can be smoothly engaged. It can be made to facilitate the assembly of the deck plate structure 10A having a predetermined area by connecting a plurality of deck plate structure 10A laterally.

  FIG. 10 is a perspective view of a deck plate structure 10B shown as another example, and FIG. 11 is a front view of the deck plate structure 10B. FIG. 12 is a partially enlarged front view showing the fixed muscle 13 and the lower end recesses 29 of the lattice muscles 26 a and 26 b in an enlarged manner, and FIG. 13 is a front view of the fixed muscle 13. 10 and 11, the front-rear direction is indicated by an arrow A (excluding FIG. 11), the horizontal direction is indicated by an arrow B, and the vertical direction is indicated by an arrow C.

  The deck plate structure 10B is different from that shown in FIG. 1 in that the pressing convex portion 31 of the fixing bar 13 is bent in an inverted V shape so as to be convex upward in the vertical direction. 1 is the same as that of the deck plate structure 10A of FIG. 1, the same reference numerals as those in FIG. 1 are attached, and the description of FIG. 1 is used, and detailed description of other configurations in the deck plate structure 10B is omitted. .

  The deck plate structure 10 </ b> B includes a metal deck 11 having a predetermined area that is long in the front-rear direction, a plurality of reinforcing bars truss 12 arranged on the upper surface 16 of the deck 11 and arranged in the lateral direction, and the front-rear direction disposed on the upper surface 16 of the deck 11. It is made of a plurality of fixed muscles 13 arranged at equal intervals in the direction. The deck plate structure 10B is used to construct a slab such as a floor slab, a ceiling slab, a roof slab or the like having a predetermined area, similar to that of FIG.

  The metal deck 11 is formed with a plurality of welding projections 18a and 18b that protrude upward from the upper surface 16 and extend in the front-rear direction. The welding convex portions 18a and 18b have a pair of both side portions 19 extending substantially straight upward from the upper surface 16 of the metal deck 11, and a top portion 20 extending substantially horizontally between the both side portions 19 (FIG. 6, FIG. 6). 7 support). The top portion 20 is formed with a welding projection 21 which is located at the center and protrudes upward. A first hook 22 (first engagement portion) is formed on one side edge portion 14a of the metal deck 11, and a second hook 23 (second engagement portion) is formed on the other side edge portion 14b. It has been.

  These rebar trusses 12 are arranged on the upper surface 16 of the metal deck 11 and between the welding projections 18a, 18b of the deck 11, and extend in parallel in the front-rear direction. The reinforcing bar truss 12 is assembled from one upper bar 24, two (a pair) lower bars 25a, 25b, and two (a pair) lattice bars 26a, 26b. The upper end line 24 is located between the pair of welding convex portions 18a and 18b arranged in the lateral direction, and extends straightly in the front-rear direction with a predetermined distance from the upper surface 16 of the metal deck 11.

  The lower end stripes 25a and 25b are positioned between the pair of welding convex portions 18a and 18b arranged in the lateral direction (inside the weld convex portions 18a and 18b), are located outside the lattice stripes 26a and 26b, and It is located below the muscle 24 and on both sides of the upper edge muscle 24 in the lateral direction. The lower end stripes 25a and 25b are separated from the upper surface 16 of the metal deck 11 by a predetermined distance upward and extend straight in the front-rear direction.

  These lattice stripes 26a, 26b are located between the pair of welding projections 18a, 18b arranged in the lateral direction (inside the welding projections 18a, 18b) and located between the metal deck 11 and the upper end reinforcement 24. It extends in the front-rear direction while repeating undulations (bending) in a wavy manner in the up-down direction. The lattice stripes 26 a and 26 b include an upper end convex portion 27 located on the upper end stripe 24 side, a lower end concave portion 29 located on the upper surface 16 side of the metal deck 11, and an intermediate portion extending between the upper end convex portion 27 and the lower end concave portion 29. Part 28.

  The pair of lattice muscles 26a and 26b are arranged symmetrically in the lateral direction with the upper end muscle 24 interposed therebetween. The lattice stripes 26a and 26b are inclined at a predetermined angle with respect to the metal deck 11 and spread outwardly from the upper end convex portion 27 toward the lower end concave portion 29 in the lateral direction. The upper end convex portions 27 of the lattice stripes 26a and 26b are bent in a substantially inverted V shape so as to be convex upward in the vertical direction. The upper end convex portion 27 abuts on the peripheral surface of the upper end stripe 24, and a portion of the upper end convex portion 27 that intersects the upper end stripe 24 is welded (fixed) to the upper end stripe 24 by spot welding.

  The intermediate portion 28 of the lattice bars 26a and 26b is located inside the lower end bars 25a and 25b, and a portion of the intermediate portion 28 that intersects with the lower end bars 25a and 25b is welded (fixed) to the lower end bars 25a and 25b by spot welding. ) The lower end recesses 29 of the lattice stripes 26a and 26b are bent in a substantially V shape so as to be recessed downward in the vertical direction. The bottom end portion 29 of the lower end concave portion 29 is adjacent to the welding convex portions 18a and 18b in the immediate vicinity of the welding convex portions 18a and 18b. A bottom portion 30 of the lower end recess 29 is in contact with the upper surface 16 of the metal deck 11. The bottom portion 30 has a curvature that is substantially the same as the curvature of the fixed muscle, or a curvature that is slightly larger than the curvature of the fixed muscle. Spot welding of the upper end reinforcement 24 and the upper end convex portion 27 of the lattice reinforcement 26a, 26b and spot welding of the lower end reinforcement 25a, 25b and the intermediate portion 28 of the lattice reinforcement 26a, 26b are the same as those of the reinforcing bar truss 12 of FIG. It is.

  The fixed muscle 13 has a pressing convex portion 31 bent into a V shape so as to be convex above the lower end concave portion 29 of the lattice muscles 26a and 26b, and a remaining portion 32 excluding the pressing convex portion 31. It is located on the upper surface 16 of the metal deck 11 and extends in the lateral direction. The pressing convex portion 31 has a pair of first and second upstanding portions 33a and 33b extending obliquely upward, is formed in a substantially inverted triangular shape, and is formed on the bottom portion 30 of the lower end concave portion 29 of the lattice muscles 26a and 26b. Is placed on top. The angle of the pressing protrusion 31 bent into a V shape is substantially the same as the angle of the lower end recess 29 of the lattice stripes 26a and 26b bent into a V shape. The pressing convex portion 31 is in contact with the lower end concave portion 29 while being tilted to one of the front and rear in the front and rear direction. The remaining portion 32 is located between the pressing projections 31 and extends in a straight line in the lateral direction. The remaining portion 32 which is the other side edge portion 14b of the metal deck 11 and extends in the vicinity of the second hook 23 is bent downward from the welding convex portions 18a and 18b toward the upper surface 16 of the metal deck 11, and is inclined downward. doing. The height dimension L3 of these standing portions 33a and 33b is in the range of 8 to 15 mm.

  If the pressing protrusion 31 of the fixing bar 13 is disposed on the bottom portion 30 of the lower end recess 29 before spot welding the remaining portion 32 of the fixing bar 13 to the welding protrusions 18a and 18b, the pressing protrusion 31 (first And the second upright portions 33a and 33b) fall into either the front-rear direction front side or the front-rear direction rear side at the bottom 30 of the lower end recess 29, and the pressing projection 31 is positioned on the bottom portion 30 and the rest of the fixed muscle 13 remains. The peripheral surface of the portion 32 is placed on the welding protrusion 21 of the top portion 20 of the welding projections 18a, 18b. The remaining portion 32 is welded (fixed) to the top portion 20 of the welding projections 18a and 18b by spot welding.

  When the remaining portion 32 of the fixing bar 13 and the top portion 20 of the welding projections 18a and 18b are welded, the lower end recesses 29 of the lattice bars 26a and 26b are formed on the upper surface 16 of the metal deck 11 and the pressing projection 31 of the fixing bar 13. The lattice bars 26 a and 26 b (rebar truss 12) are firmly fixed to the upper surface 16 of the deck 11. Spot welding of the remaining portion 32 of the fixed bar 13 and the top portion 20 of the welding projections 18a and 18b is the same as that of the deck plate structure 10A of FIG.

  In the deck plate structure 10B, the diameter L1 of the lattice bars 26a, 26b is substantially the same as or slightly larger than the height dimension L2 of the weld protrusions 18a, 18b from the upper surface 16 of the metal deck 11, and the pressing protrusions of the fixed bars 13 Since 31 is bent in a V shape, even if the pressing protrusion 31 is disposed on the bottom portion 30 of the lower end recess 29 of the lattice stripes 26a and 26b, the fixing stripe 13 moves laterally. The standing portions 33a and 33b of the pressing convex portion 31 abut against the peripheral surface of the lower end concave portion 29 of the lattice muscles 26a and 26b, and the further movement of the fixing muscle 13 is prevented. While being positioned at the bottom portion 30 of the concave portion 29, the remaining portion 32 of the fixing bar 13 is positioned at the top portion 20 of the welding convex portions 18a and 18b. The diameter L1 of the lattice stripes 26a and 26b and the height dimension L2 of the weld projection 16 (both side portions 19) from the upper surface 16 of the metal deck 11 are the same as those of the deck plate structure 10A of FIG.

  The construction procedure of the slab using the deck plate structure 10B is the same as that of the slab using the deck plate structure 10A of FIG. In addition, when placing concrete or placing the deck plate structure 10B between the cross beams of the building, a load is applied from the upper side to the lower side of the deck plate structure 10B, and the lower end concave portions 29 of the lattice bars 26a and 26b are formed. Even when trying to move outward in the lateral direction, the lower end concave portion 29 collides with the first standing portion 33a of the pressing convex portion 31, and the first standing portion 33a prevents further movement of the lower end concave portion 29. Further, when placing concrete or placing the deck plate structure 10B between the cross beams of the building, a load is applied to the deck plate structure 10B inward in the lateral direction, and the lower end concave portions 29 of the lattice bars 26a and 26b are formed. Even when trying to move inward in the lateral direction, the lower end recessed portion 29 collides with the second standing portion 33b of the pressing projection 31 and the second standing portion 33b prevents further movement of the lower end recessed portion 29.

  In the deck plate structure 10B, since the pressing convex portion 31 of the fixed muscle 13 is positioned on the bottom portion 30 of the lower end concave portion 29, it is not necessary to separately position the fixed muscle 13 with respect to the lattice muscles 26a and 26b. The remaining portion 32 can be securely fixed to the top portion 20 of the welding projections 18a, 18b. In the deck plate structure 10B, the remaining portion 32 of the fixing bar 13 comes into contact with the top portion 20 of the welding projections 18a and 18b, and the remaining portion 32 and the top portion 20 of the welding projections 18a and 18b are securely fixed by welding. Therefore, the lower end concave portions 29 of the lattice bars 26a and 26b can be sandwiched between the upper surface 16 of the metal deck 11 and the pressing convex portion 31 of the fixing bars 13, and the lattice bars 26a and 26b (reinforcing bar truss 12) are made of metal. It can be firmly fixed to the upper surface 16 of the deck 11. Therefore, the rebar truss 12 and the metal deck 11 are not unintentionally released.

  In the deck plate structure 10 </ b> B, the lower end recesses 29 of the lattice bars 26 a and 26 b are sandwiched between the upper surface 16 of the metal deck 11 and the fixing bars 13, whereby the lattice bars 26 a and 26 b are firmly attached to the upper surface 16 of the metal deck 11. Since it is fixed, the reinforcing bar truss 12 can be securely fixed to the upper surface 16 of the deck 11, and the fixing between the deck 11 and the reinforcing bar truss 12 is not inadvertently released, and the deck plate structure 10B is made of concrete. When concrete is placed, the concrete, the metal deck 11 and the reinforced truss 12 form a reinforced concrete structure, and even if bending tensile force, bending compressive force, or shearing force acts on the concrete, the cracks are caused in the concrete by these forces. The deck plate structure 10B is used to form a slab having sufficient strength. It can be.

  In the deck plate structure 10B, since the remaining portion 32 of the fixing bar 13 is welded and fixed to the welding convex portions 18a and 18b adjacent to the lower end concave portion 29 of the lattice bars 26a and 26b, the pair of welding convex portions 18a and 18b. The lateral dimension of the fixing bar 13 extending between the upper and lower sides of the metal deck 11 is firmly fixed to the upper surface 16 of the metal deck 11 by pressing the lower end recesses 29 of the lattice bars 26a and 26b. The rebar truss 12 can be firmly fixed to the upper surface 16 of the deck 11 without loosening.

  In the deck plate structure 10 </ b> B, the remaining portion 32 of the fixing bar 13 is welded to the welding convex portions 18 a and 18 b formed on the metal deck 11, and the lower end concave portion 29 of the lattice bars 26 a and 26 b is in contact with the upper surface 16 of the deck 11. The bottom end recess 29 is not directly welded to the deck, so that the appearance of the deck 11 is not spoiled, and the bottom surface 17 of the deck 11 is not marked with welding marks. The occurrence of rust in 17 can be prevented. In the deck plate structure 10 </ b> B, the remaining portion 32 of the fixing bar 13 extending in the vicinity of the second hook 23 is bent downward and inclined downward, so that the remaining portion 32 obstructs the engagement of the hooks 22 and 23. The hooks 22 and 23 can be smoothly engaged, and a plurality of deck plate structures 10B can be connected in the lateral direction to form an assembly of deck plate structures 10B having a predetermined area. .

  FIG. 14 is a top view of a deck plate structure 10C shown as another example, and FIG. 15 is a front view of the deck plate structure 10C. FIG. 16 is a partial side view of the deck plate structure 10C. 14 and 15, the front-rear direction is indicated by an arrow A (except for FIG. 15), the horizontal direction is indicated by an arrow B, and the vertical direction is indicated by an arrow C.

  The deck plate structure 10C is different from that shown in FIG. 1 in that the lower end bars 25a and 25b are located inside the lattice bars 26a and 26b, and a void 35 extending in the front-rear direction between the adjacent reinforcing bars truss 12. 1 is the same as that of the deck plate structure 10A of FIG. 1, and therefore, the same reference numerals as those of FIG. 1 are used, and the description of FIG. Detailed description of other components in 10C will be omitted.

  The deck plate structure 10 </ b> C includes a metal deck 11 having a predetermined area that is long in the front-rear direction, a plurality of reinforcing bars truss 12 that are arranged on the upper surface 16 of the deck 11 and arranged in the lateral direction, and the front-rear direction. It is made of a plurality of fixed muscles 13 arranged at equal intervals in the direction, a plurality of voids 35, and a plurality of void placement muscles 36. The deck plate structure 10C is used to construct a slab such as a floor slab, a ceiling slab, a roof slab, etc. having a predetermined area, similar to that of FIG.

  The metal deck 11 is formed with a plurality of welding projections 18a and 18b that protrude upward from the upper surface and extend in the front-rear direction. The welding convex portions 18a and 18b have a pair of both side portions 19 extending substantially straight upward from the upper surface 16 of the metal deck 11, and a top portion 20 extending substantially horizontally between the both side portions 19 (FIG. 6, FIG. 6). 7 support). The top portion 20 is formed with a welding projection 21 which is located at the center and protrudes upward. A first hook 22 (first engagement portion) is formed on one side edge portion 14a of the metal deck 11, and a second hook 23 (second engagement portion) is formed on the other side edge portion 14b. It has been.

  These rebar trusses 12 are arranged on the upper surface 16 of the metal deck 11 and between the welding projections 18a, 18b of the deck 11, and extend in parallel in the front-rear direction. The reinforcing bar trusses 12 are assembled from one upper bar 24, two (a pair) lower bars 25a and 25b, and two (a pair) lattice bars 26a and 26b. The upper end line 24 is located between the pair of welding convex portions 18a and 18b arranged in the lateral direction, and extends straightly in the front-rear direction with a predetermined distance from the upper surface 16 of the metal deck 11. The lower end stripes 25a and 25b are positioned between the pair of welding convex portions 18a and 18b arranged in the lateral direction (inside the weld convex portions 18a and 18b), are located inside the lattice stripes 26a and 26b, and It is located below the muscle 24 and on both sides of the upper edge muscle 24 in the lateral direction. The lower end stripes 25a and 25b are separated from the upper surface 16 of the metal deck 11 by a predetermined distance upward and extend straight in the front-rear direction.

  These lattice stripes 26a, 26b are located between the pair of welding projections 18a, 18b arranged in the lateral direction (inside the welding projections 18a, 18b) and located between the metal deck 11 and the upper end reinforcement 24. It extends in the front-rear direction while repeating undulations (bending) in a wavy manner in the up-down direction. The lattice stripes 26 a and 26 b include an upper end convex portion 27 located on the upper end stripe 24 side, a lower end concave portion 29 located on the upper surface 16 side of the metal deck 11, and an intermediate portion extending between the upper end convex portion 27 and the lower end concave portion 29. Part 28.

  The pair of lattice muscles 26a and 26b are arranged symmetrically in the lateral direction with the upper end muscle 24 interposed therebetween. The lattice stripes 26a and 26b are inclined at a predetermined angle with respect to the metal deck 11 and spread outwardly from the upper end convex portion 27 toward the lower end concave portion 29 in the lateral direction. The upper end convex portions 27 of the lattice stripes 26a and 26b are bent in a substantially inverted V shape so as to be convex upward in the vertical direction. The upper end convex portion 27 abuts on the peripheral surface of the upper end stripe 24, and a portion of the upper end convex portion 27 that intersects the upper end stripe 24 is welded (fixed) to the upper end stripe 24 by spot welding.

  The intermediate portion 28 of the lattice bars 26a, 26b is located outside the lower end bars 25a, 25b, and the portion of the intermediate portion 28 that intersects with the lower end bars 25a, 25b is welded (fixed) to the lower end bars 25a, 25b by spot welding. ) The lower end recesses 29 of the lattice stripes 26a and 26b are bent in a substantially V shape so as to be recessed downward in the vertical direction. The bottom recesses 29 of the lattice stripes 26a, 26b have their bottom portions 30 inside the welding projections 18a, 18b and adjacent to the welding projections 18a, 18b. A bottom portion 30 of the lower end recess 29 is in contact with the upper surface 16 of the metal deck 11. The bottom portion 30 has a curvature that is substantially the same as the curvature of the fixed muscle 13 or a curvature that is slightly larger than the curvature of the fixed muscle 13. Spot welding of the upper end reinforcement 24 and the upper end convex portion 27 of the lattice reinforcement 26a, 26b and spot welding of the lower end reinforcement 25a, 25b and the intermediate portion 28 of the lattice reinforcement 26a, 26b are the same as those of the reinforcing bar truss 12 of FIG. It is.

  When the reinforcing bar truss 12 is disposed between the pair of welding convex portions 18a and 18b, the bottom portion 30 of the lower end concave portion 29 of the lattice bars 26a and 26b comes into contact with the lower ends of the side portions of the welding convex portions 18a and 18b. Positioning of the truss 12 in the lateral direction is easy, and it is not necessary to arrange the reinforcing bar truss 12 on the upper surface 16 of the metal deck 11 while measuring the lateral separation distance. The deck plate structure 10C in which the rebar trusses 12 are arranged side by side in a lateral direction can be easily assembled.

  The fixing bar 13 has a pressing convex part 31 protruding upward from the lower end concave part 29 of the lattice bars 26 a and 26 b and a remaining part 32 excluding the pressing convex part 31, and is located on the upper surface 16 of the metal deck 11. Extending laterally. The pressing convex portion 31 includes a pair of first and second upright portions 33a and 33b extending upward, and a horizontal portion 34 extending between the upright portions 33a and 33b and straddling the lower end recess 29 of the lattice muscles 26a and 26b. The horizontal portion 34 is disposed on the bottom portion 30 of the lower end concave 29 portion. The pressing convex portion 31 is in contact with the lower end concave portion 29 while being tilted to one of the front and rear in the front and rear direction. The remaining portion 32 is located between the pressing projections 31 and extends in a straight line in the lateral direction. The remaining portion 32 which is the other side edge portion 14b of the metal deck 11 and extends in the vicinity of the second hook 23 is bent downward toward the upper surface 16 of the metal deck 11 from the welding projections 18a and 18b and inclined downward. doing. The height L3 of the upright portions 33a and 33b is the same as that of the deck plate structure 10A of FIG.

  If the pressing protrusion 31 of the fixing bar 13 is disposed on the bottom portion 30 of the lower end recess 29 before spot welding the remaining portion 32 of the fixing bar 13 to the welding protrusions 18a and 18b, the pressing protrusion 31 (first And the second upright portions 33a and 33b) fall into either the front-rear direction front or the front-rear direction rearward in the bottom portion 30 so that the pressing convex portion 31 is positioned on the bottom portion 30 and the remaining portion 32 of the fixing bar 13 The peripheral surface is placed on the welding protrusion 21 of the top portion 20 of the welding projections 18a and 18b formed on the metal deck 11. The remaining portion 32 of the fixing bar 13 is welded (fixed) to the top portions of the welding convex portions 18a and 18b by 20-spot welding. When the remaining portion 32 of the fixing bar 13 and the top portion 20 of the welding projections 18a and 18b are welded, the lower end recesses 29 of the lattice bars 26a and 26b are formed on the upper surface 16 of the metal deck 11 and the pressing projection 31 of the fixing bar 13. The lattice bars 26 a and 26 b (rebar truss 12) are firmly fixed to the upper surface 16 of the deck 11. Spot welding of the remaining portion 32 of the fixed bar 13 and the top portion 20 of the welding projections 26a and 26b is the same as that of the deck plate structure 10A of FIG.

  In the deck plate structure 10C, the diameter L1 of the lattice bars 26a, 26b is substantially the same as or slightly larger than the height dimension L2 from the upper surface 16 of the metal deck 11 of the welding convex portions 18a, 18b (both side portions 19). Even if the fixed muscle 13 moves in the lateral direction when the pressing convex portion 31 of the muscle 13 is arranged on the bottom portion 30 of the lower end concave portion 29 of the lattice muscles 26a and 26b, the rising portion 33a of the pressing convex portion 31 is provided. , 33b abuts against the peripheral surface of the lower end recess 29 of the lattice muscle 26a, 26b, and further movement of the fixed muscle 13 is prevented, and the pressing convex portion 31 of the fixed muscle 13 is positioned at the bottom portion 30 of the lower end recess 29. At the same time, the remaining portion 32 of the fixing bar 13 is positioned on the top portion 20 of the welding projections 18a, 18b. The diameter L1 of the lattice stripes 26a and 26b and the height dimension L2 of the weld projection 16 (both side portions 19) from the upper surface 16 of the metal deck 11 are the same as those of the deck plate structure 10A of FIG.

  The construction procedure of the slab using the deck plate structure 10C is the same as that of the slab using the deck plate structure 10A of FIG. In addition, when placing concrete or placing the deck plate structure 10C between the cross beams of the building, a load is applied from the upper side to the lower side of the deck plate structure 10C, and the lower end concave portions 29 of the lattice bars 26a and 26b are formed. Even when trying to move outward in the lateral direction, the lower end concave portion 29 collides with the first standing portion 33a of the pressing convex portion 31, and the first standing portion 33a prevents further movement of the lower end concave portion 29. Further, when placing concrete or placing the deck plate structure 10C between the cross beams of the building, a load is applied to the deck plate structure 10C inward in the lateral direction, and the lower end recesses 29 of the lattice bars 26a and 26b are formed. Even when trying to move inward in the lateral direction, the lower end recessed portion 29 collides with the second standing portion 33b of the pressing projection 31 and the second standing portion 33b prevents further movement of the lower end recessed portion 29.

  In the deck plate structure 10C, since the pressing convex portion 31 of the fixed muscle 13 is positioned on the bottom portion 30 of the lower end concave portion 29, it is not necessary to separately position the fixed muscle 13 with respect to the lattice muscles 26a and 26b. The remaining portion 32 can be securely fixed to the top portion 20 of the welding projections 18a, 18b. In the deck plate structure 10C, since the lower end bars 25a and 25b are located inside the lattice bars 26a and 26b and inside the welding projections 18a and 18b, the lower end bars 25a and 25b obstruct the electrodes. The fixing bars 13 and the welding convex portions 18a and 18b can be reliably welded and fixed by these electrodes.

  In the deck plate structure 10C, the remaining portion 32 of the fixing bar 13 abuts on the top portion 20 of the welding projections 18a and 18b, and the remaining portion 32 can be securely fixed to the top portion 20 by welding. The lower end recesses 29 of the metal deck 11 can be sandwiched between the upper surface 16 of the metal deck 11 and the pressing protrusion 31 of the fixing bar 13, and the lattice bars 26 a and 26 b (rebar truss 12) are firmly fixed to the upper surface 16 of the deck 11. can do. Therefore, the rebar truss 12 and the metal deck 11 are not unintentionally released.

  The void placement bar 36 is placed on the lower end bars 25a and 25b and extends in the lateral direction with a predetermined distance in the front-rear direction. The void placing bar 36 is connected to the lower end bars 25a and 25b by a metal fastening line (not shown). These voids 35 are disposed between the adjacent rebar trusses 12 and extend in the front-rear direction. The void 35 is a hollow tubular tube made of a metal plate. The voids 35 are fixed to the deck plate structure 10 </ b> C by predetermined fixing means (not shown) in a state where the voids 35 are mounted on the void mounting bars 36 extending between the reinforcing bars truss 12. In addition to the pipe material, foam (hard urethane foam, phenol foam, bead method polystyrene foam) can also be used as the void 35.

  In the deck plate structure 10 </ b> C, the lower end recesses 29 of the lattice bars 26 a and 26 b are sandwiched between the upper surface 16 of the metal deck 11 and the fixing bars 13, whereby the lattice bars 26 a and 26 b are firmly fixed to the upper surface 16 of the deck 11. Therefore, the reinforcing bar truss 12 can be securely fixed to the upper surface 16 of the deck 11, and the fixing between the deck 11 and the reinforcing bar truss 12 is not inadvertently released, and the concrete is applied to the deck plate structure 10C. When the concrete is placed and the metal deck 11 and the reinforced truss 12 form a reinforced concrete structure, even if bending tensile force, bending compressive force, or shearing force is applied to the concrete, cracks are caused in the concrete by these forces. It does not occur, and a slab having sufficient strength is constructed using the deck plate structure 10C. It is possible.

  In the deck plate structure 10C, since the remaining portion 32 of the fixing bar 13 is welded and fixed to the welding convex portions 18a and 18b adjacent to the lower end concave portion 29 of the lattice bars 26a and 26b, the pair of welding convex portions 18a and 18b. The lateral dimension of the fixing bar 13 extending between the upper and lower sides of the metal deck 11 is firmly fixed to the upper surface 16 of the metal deck 11 by pressing the lower end recesses 29 of the lattice bars 26a and 26b. The rebar truss 12 can be firmly fixed to the upper surface 16 of the deck 11 without loosening.

  In the deck plate structure 10 </ b> C, the remaining portion 32 of the fixing bar 13 is welded to the welding convex portions 18 a and 18 b formed on the metal deck 11, and the lower end concave portion 29 of the lattice bars 26 a and 26 b is in contact with the upper surface 16 of the deck 11. Since the lower end recess 29 is not welded directly to the deck 11, the aesthetic appearance of the deck 11 is not impaired, and no welding marks are generated on the lower surface 17 of the deck 11. The occurrence of rust on the lower surface 17 can be prevented. In the deck plate structure 10 </ b> C, the remaining portion 32 of the fixing bar 13 extending in the vicinity of the second hook 23 is bent downward from the welding convex portions 18 a and 18 b toward the upper surface 16 of the metal deck 11 to be inclined downward. Therefore, the remaining portion 32 does not interfere with the engagement of the hooks 22 and 23, the hooks 22 and 23 can be smoothly engaged, and a plurality of deck plate structures 10C are connected in the lateral direction. A set of deck plate structures 10C having a predetermined area can be formed.

  In the deck plate structure 10C, voids 35 are used instead of concrete, and it is not necessary to place concrete in the entire area of the deck plate structure 10C, and the volume of the void 35 can be omitted. The time and labor required for the slab can be reduced, and the cost for constructing the slab can be reduced. Compared to the case where only concrete is placed on the deck plate structure 10C, the volume of concrete of the void 35 can be omitted, so that the weight of the slab can be reduced, and a steel frame structure or a reinforced concrete structure can be achieved. Can be reduced.

DESCRIPTION OF SYMBOLS 10A Deck plate structure 10B Deck plate structure 10C Deck plate structure 11 Metal deck 12 Reinforcing bar truss 13 Fixed bar 14a, b Both-side edge 15a, b Both-end edge 16 Upper surface 17 Lower surface 18a, b Welding convex part 19 Both-side part 20 Top portion 21 Welding protrusion 22 First hook (first engaging portion)
23 Second hook (second engaging portion)
24 upper end stripes 25a, b lower end stripes 26a, b lattice stripes 27 upper end convex part 28 middle part 29 lower end concave part 30 bottom part 31 pressing convex part 32 remaining part 33a first standing part (standing part)
33b Second standing part (standing part)
34 Horizontal portion 35 Void 36 Void placement muscle L1 Diameter L2 Height dimension L3 Height dimension

Claims (10)

In a deck plate structure for building a slab of a predetermined area,
The deck plate structure has a predetermined area metal deck having both side edges extending in the front-rear direction and both end edges extending in the lateral direction, a reinforcing bar truss installed on the upper surface of the metal deck and extending in the front-rear direction, and the metal A fixing bar located on the upper surface of the deck, extending in the lateral direction and arranged at a predetermined distance in the front-rear direction;
The metal deck has a welding projection that protrudes upward from its upper surface and extends in the front-rear direction and is arranged at a predetermined distance in the lateral direction, and the rebar truss is a pair of welding projections arranged in the lateral direction. Between the upper and lower ends of the metal deck and extending in the front-rear direction, and between the pair of welding projections and between the metal deck and the upper end bars. A pair of lower streaks extending in the front-rear direction, and a pair of lattice bars extending in the front-rear direction between the pair of weld projections and repeatedly undulating in the vertical direction between the metal deck and the upper end bars Formed from
The lattice muscles spread laterally outwardly from the upper end convex portion that contacts the upper end muscle and bends in a convex shape toward the lower end concave portion that contacts the upper surface of the metal deck and bends in a concave shape. An upper end convex portion is welded to the upper end muscle, an intermediate portion of the lattice muscles is welded to the lower end muscle, and the fixing muscle protrudes upward from the lower end concave portion of the lattice muscles and the presser And the remaining portion of the fixing bar is disposed on the lower end of the lattice, and the remaining portion of the fixing bar is disposed on the welding projection of the metal deck. A deck plate structure which is welded to the welding convex portion, and a lower end concave portion of the lattice is sandwiched between the upper surface of the metal deck and the pressing convex portion.   The lattice bars are made of a metal rod having a circular cross section, and the diameter of the lattice bars is substantially the same as or slightly larger than the height dimension of the weld projection from the top surface of the metal deck. In the deck plate structure, 2. The deck plate structure according to claim 1, wherein when the fixing bars are arranged in the welding convex part and the lower end concave part, the remaining part of the fixing bars contacts the top part of the welding convex part.   The fixing bar is made of a metal rod having a circular cross section, and in the deck plate structure, when the fixing bar is arranged in the welding convex part and the lower end concave part, the pressing convex part of the fixing bar is the lattice. 3. The deck plate structure according to claim 1, wherein the deck plate structure is in contact with the lower end recess while tilting forward or backward in the front-rear direction at the lower end recess of the line.   In the deck plate structure, the pressing projections of the fixing bars have a pair of standing portions extending upward and a horizontal portion extending between the standing portions and straddling the lower end recessed portions of the lattice muscles. When the fixing bars are arranged in the welding convex part and the lower end concave part, the standing part and the horizontal part are inclined to either the front or rear in the front-rear direction and the rear in the lower part concave part of the lattice muscle, The deck plate structure according to claim 3, wherein the portion abuts on a lower end concave portion of the lattice muscle.   In the deck plate structure, when the fixing bar is disposed in the welding convex part and the lower end concave part, the lower end concave part is substantially arranged so that the pressing convex part of the fixing bar is located in the lower end concave part of the lattice bar. The deck plate structure according to claim 3 or 4, wherein the deck plate structure is bent in a V shape.   The fixing bar is made of a metal bar having a circular cross section, and in the deck plate structure, when the fixing bar is arranged in the welding convex part and the lower end concave part, the fixing bar is a lower end concave part of the lattice bar. The pressing convex portion is bent in a substantially inverted V shape so as to be positioned at the position, the lower end concave portion is bent in a substantially V shape, and the pressing convex portion bent in a substantially inverted V shape is substantially V-shaped. 3. The deck plate structure according to claim 1, wherein the lower end recessed portion bent in a shape is in contact with the lower end recessed portion while tilting forward or backward in the front-rear direction.   The lower end bars are located outside the lattice bars, and are located inside the pair of weld projections, and the lower end recesses of one of the lattice bars are one weld projection part of the pair of weld projections. Is located on the inner side of the other welding convex portion of the pair of welding convex portions, and the remaining portion of the fixing bar and the welding convex portion are spotted. The deck plate structure according to any one of claims 1 to 6, which is welded by welding.   One welding projection of the pair of welding projections is laterally outward of the lower end recess of one lattice and adjacent to the lower end recess, and the other of the pair of welding projections The deck plate structure according to claim 7, wherein the weld convex portion is laterally outward of the lower end concave portion of the other lattice and adjacent to the lower end concave portion.   One side edge portion of the metal deck is bent downward from the deck to form a first engaging portion, and the other side edge portion of the metal deck is bent upward from the deck. A second engagement portion that engages with the engagement portion is formed, and the remaining portion of the fixing bar that is the other side edge portion of the metal deck and extends in the vicinity of the second engagement portion is separated from the welding convex portion. The deck plate structure according to any one of claims 1 to 8, wherein the deck plate structure is bent downward toward an upper surface of the metal deck.   In the deck plate structure, the reinforcing bar trusses are arranged at a predetermined distance in the lateral direction, and are voids extending in the front-rear direction between the reinforcing bars trusses adjacent in the lateral direction and extending between the pressing protrusions. The deck plate structure according to claim 1, wherein the deck plate structure is installed.

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