JP2018044372A - Floor construction method, and hoisting jig and hoisting device for floor slab unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer a floor slab unit efficiently and safely to a floor construction floor of a building.SOLUTION: A floor construction method sequentially performs the following steps for: assembling a floor slab unit 3 using a plurality of deck plates 1 having a plurality of reinforcement trusses 11 lined up on a top surface of a metallic base plate 10, by lining up the base plate 10 next to each other in a direction orthogonal to a lengthwise direction of the reinforcement truss 11, in a work site on a ground; disposing edge plate materials 50a, 50b constituting a hoisting jig 5 at both edge parts in a direction of serial installation of the base plate 10 of the floor slab unit 3, such that a width direction of the edge plate materials is oriented in a vertical direction, and engaging a plurality of cut-out parts 52 recessed on a top edge of each of the edge plate materials 50a, 50b with a top reinforcement 13 of each of the reinforcement trusses 11 from below; hoisting each of the edge plate materials 50a, 50b to a same height while having the cut-out parts 52 engaged with the top reinforcement 13 of the reinforcement truss 11, and transferring the floor slab unit 3 to a floor construction floor of a building; and lowering the floor slab unit 3 on the floor construction floor and disengaging the cut out part 52 from the top reinforcement 13 of the reinforcement truss 11.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a floor slab unit assembled on the ground, in particular, a floor slab unit manufactured from the ground, which is manufactured by connecting a plurality of deck plates with rebar truss in which a plurality of rebar trusses are arranged on the upper surface of a metal substrate The present invention relates to a floor construction method for transporting an object to a floor construction floor and constructing a floor, and a lifting jig and a lifting device for a floor slab unit used to implement the floor construction method.

  Conventionally, in order to construct a floor of a steel structure building, after the framework of the building to be constructed is completed, a deck plate with a reinforcing bar truss (hereinafter referred to as a “deck plate with a reinforcing bar truss”) or simply packed A number of "deck plates") are temporarily lifted up to the floor construction floor with a crane and temporarily placed on the floor construction position. Etc. are welded one by one to the beam. However, since this type of work is “work at high places” as defined in the “Labor Safety and Health Law”, various facilities, deck plates, work tools, etc. have been introduced to prevent workers from falling and falling. Therefore, it is necessary to install safety equipment for preventing the fall in the entire area below the slab (see the column of the prior art in Patent Document 1 and the column of problems to be solved by the invention of Patent Document 2).

  In order to solve the above-mentioned problem, a structure in which a plurality of beam beams are fixed to a structure in which a plurality of deck plates are connected on the ground as a skeleton (hereinafter referred to as “deck plate structure”). After assembling, transporting this to a temporary storage area, and stacking it, the construction method was proposed in which the lower end of the sling wire was hung on the deck plate structure at the top position and lifted to the floor construction floor of the building (Patent) References 1 and 2).

JP-A-7-62875 Japanese Patent No. 5723235

  In the above construction method, it is necessary to attach at least four lifting hooks for hooking the lower end of the sling wire to the beam of the deck plate structure by welding, and if there are few hanging hooks installed, There is a problem that the balance when the plate structure is lifted is poor and the deck plate structure cannot be stably conveyed. In addition, the number of hanging hooks can be increased to improve the balance when hanging the deck plate structure. However, welding a hook as a temporary material to a steel frame (small beam) is not possible. As the number of welding points increases, there is a problem in that the steel material is adversely affected by rapid heating and rapid cooling, and the steel frame is altered.

  In order to solve the above problems all at once, the applicant of the present invention recently devised a floor slab unit that can be stably suspended without installing a hanging hook and assembled it on the ground. We proposed a floor construction method that can transport the floor slab unit efficiently and safely to the floor construction floor of the building.

  FIG. 13 shows an example of the deck plate 1 used for manufacturing the above-mentioned floor slab unit. A metal substrate 10 made of a galvanized steel plate and a plurality of the substrate 10 arranged in parallel at a constant interval L on the substrate 10. (In the illustrated example, three) reinforcing bars truss 11 are provided. In the following description, the direction in which the rebar trusses 11 are arranged is referred to as “width direction”, and the direction in which the rebar trusses 11 extend is referred to as “length direction”. On the substrate 10, a plurality of suspension members 12 are arranged in parallel at predetermined intervals along the length direction, and the upper end reinforcement 13 of each rebar truss 11 is fixed to the top of each suspension member 12 by welding. A reinforcing bar truss 11 is suspended.

  Each reinforcing bar truss 11 includes an upper bar 13, a lower bar 14 parallel to the upper bar 13, and a lattice bar 15 provided between the upper bar 13 and the lower bar 14, and is orthogonal to the suspension member 12. It is arranged in the direction, that is, the length direction. A plurality of reinforcing ribs 16 are integrally formed on the upper surface of the substrate 10 along the length direction, and joint portions 17 for connecting to the adjacent deck plates are integrally formed on both side edges of the substrate 10. .

14 to 18 show the floor construction method proposed by the applicant of the present invention prior to the development of the floor construction method of the present invention (Japanese Patent Application No. 2006-134240).
FIG. 14 shows a work place on the ground, and a plurality of deck plates 1 are loaded and temporarily placed in a stacked state on two pedestals 100 and 100 installed in parallel to the floor surface. As shown in FIG. 15, the plurality of deck plates 1 carried into the work place are placed on the gantry 100, 100 so that the substrates 10 are connected in a direction perpendicular to the length direction of the reinforcing bar truss 11 by two workers. The floor slab unit 3 having a size and a shape corresponding to the space between the opposing beams of the building is assembled. In this case, the substrate 10 of each deck plate 1 is connected to the substrate 10 of the adjacent deck plate 1 via the joint portion 17.

  As shown in FIG. 16, two metal bars 2 and 2 (for example, steel bars) are assembled to the floor slab unit 3. Each bar 2 is disposed over the entire length at a position symmetrical with respect to the center line c of the floor slab unit 3 along the direction in which the substrates 10 are continuous. It passes over the muscle 14. Both ends of each bar 2 extend to the deck plates 1 and 1 at both ends.

  In order to fix each bar 2 to the upper bar 13 of the reinforcing bar truss 11, each bar 2 and the upper bar 13 can be fixed by arc welding at the crossing position with the upper bar 13, but welded to the upper bar. In order to prevent adverse effects of heat, in the next step shown in FIG. 17, the bars 2 and the upper end bars 13 are bound together by a metal wire 20 at the crossing position with the upper end bars 13. By this binding, the plurality of deck plates 1 are kept in a continuous state.

  In order to follow the work for installing the floor slab unit on the beam on the upper floor, that is, the work that does not require time, it takes much time and time to manufacture the floor slab unit. It is necessary to manufacture the floor slab unit in advance and pile it up in a stacked state for storage in the temporary storage area. When constructing the floor of a steel structure building, after completing the temporary assembly of the building to be constructed, the floor slab units 3 stacked in the temporary storage place are sequentially moved from the uppermost position by the lifting device shown in FIG. It is lifted and transported to the floor construction floor of the building and positioned and fixed at the position of the floor to be constructed.

  The illustrated lifting device includes a traverser 8 in which a plurality of sling wires 9a, 9b are suspended, and a hook 95 provided at the lower end of each sling wire 9a, 9b is each bar 2 of the floor slab unit 3 in the uppermost position. , 2 is hooked. The traverser 8 has a rectangular frame 80 having a shape substantially matching the outer shape of the floor slab unit 3. The rectangular frame 80 includes two parallel suspension frame members 81a and 81b, two connection frame members 82 that connect both ends of the suspension frame members 81a and 81b, and a connection frame member 83 provided at three intermediate positions. -85.

  A connecting portion to which the lower end portions of a plurality of wire ropes 86 suspended from a crane (not shown) are connected at positions where the connecting frame members 83, 84, 85 are provided on the upper surfaces of the suspension frame members 81a, 81b. 87 is provided. Moreover, the same connection part 88 is provided in the lower surface of each suspension frame material 81a, 81b for every fixed space | interval, and the sling wire which reaches one side edge of the floor slab unit 3 from each connection part 88 of one suspension frame material 81a The sling wires 9b that reach the other side edge of the floor slab unit 3 from the respective connection portions 88 of the other suspension frame member 81b are suspended. Each sling wire 9a, 9b has a thimble 93 at the upper end connected to the connecting portion 88, and a hook 95 to be hooked on each bar 2 of the floor slab unit 3 is attached to the thimble 94 at the lower end.

  When the above-described floor slab unit 3 is conveyed, the floor slab unit 3 is suspended by hooking hooks 95 at the lower ends of the plurality of sling wires 9a and 9b at predetermined intervals on each bar 2 and 2. Can do. Since each bar 2 passes below the upper bar 13 of each reinforcing bar truss 11, when the floor slab unit 3 is suspended, the bar 2 supports the load of the floor slab unit 3 via the upper bar 13, There is no possibility that the floor slab unit 3 is dropped during the transportation of the floor slab unit 3.

  However, in order to carry out the above-described floor construction method, after passing the two bars 2 and 2 below the upper bar 13 and above the lower bar 14 of each reinforcing bar truss 11, Since it is necessary to bind to the upper bar 13 with the metal wire 20 at the position where the upper bar 13 of the reinforcing bar truss 11 intersects, it takes time to assemble the bar 2 and increases the work load on the operator. . When the bar 2 is reused, it is necessary to remove the two bars 2 from the floor slab unit 3 after installing the floor slab unit 3 on the floor construction floor. Unnecessary work is required, and the work burden on the worker is further increased. Although it is possible to embed each of the bars 2 in the concrete as it is, the bars 2 are wasted, which is uneconomical.

  The present invention has been made paying attention to the above problem, and can stably suspend a floor slab unit without installing a hanging hook, and can efficiently and safely construct a floor of a building. An object of the present invention is to provide a floor construction method in which a floor slab unit can be transported to a floor to construct a floor, and resources are not consumed wastefully.

  In the floor construction method according to the present invention, a plurality of rebar truss deck plates, in which a plurality of rebar trusses are arranged in parallel on an upper surface of a metal substrate, are assembled by connecting the substrates in a direction perpendicular to the length direction of the rebar trusses. The floor slab unit is transported from the ground to the floor construction floor of the building to construct the floor, and the step of assembling the floor slab unit at the ground workplace and the direction in which the substrates of the floor slab unit are connected The end plate material which comprises the jig | tool for lifting is arrange | positioned in the both ends along this, and the several notch part recessedly provided in the upper side part of each end plate material is engaged from the lower part to the reinforcing bar of each rebar truss And a step of lifting each end plate material to the same height in a state where the respective notches are engaged with the reinforcing bars of each reinforcing bar truss and transporting the floor slab unit to the floor construction floor of the building in a horizontal posture, and Lower the floor slab unit to the floor construction floor Then, after installing between the beams, the floor is constructed by sequentially performing the step of removing each end plate material from the floor slab unit by releasing the engagement between each notch and the reinforcing bar of each reinforcing bar truss. It is what.

  According to the floor construction method of the present invention, at each end of the floor slab unit, each notch portion of each end plate material is engaged with the reinforcing bar of each rebar truss from below, and each end plate material is lifted to the same height, The floor slab unit can be transported from the ground to the floor construction floor of the building without changing the shape of the floor slab unit. Moreover, each end plate material can be removed from the floor slab unit by lowering each end plate material on the floor construction floor and releasing the engagement between each notch portion and each rebar of each rebar truss.

  In a preferred embodiment, the reinforcing bar truss includes an upper end bar, a lower end bar, and a lattice bar, and a notch portion of the end plate material is engaged with the upper end bar from below, but the reinforcing bar used for manufacturing the floor slab unit is used. The reinforcing bar truss of the deck plate with the truss is not limited to the above-described configuration.

  In the above-described configuration of the present invention, each of the end plate members is made of any one of a flat steel, an L-shaped steel, and a CT-shaped steel, and two or more end plate materials are connected in a straight line.

  In the lifting jig for a floor slab unit according to the present invention, a plurality of rebar truss deck plates in which a plurality of rebar trusses are arranged in parallel on the upper surface of a metal substrate are in a direction perpendicular to the length direction of the rebar trusses. It is used to construct a floor by transporting a floor slab unit assembled by connecting substrates to the floor construction floor of a building from the ground. It consists of a pair of end plate materials. A plurality of notch portions that are provided with a detachable connecting portion to which a connecting tool provided at the lower end of the hanging wire is connected, and are engaged with the reinforcing bars of the reinforcing bar trusses of the floor slab unit from below at the upper side portion. Is recessed.

  Further, the lifting device for floor slab unit according to the present invention is such that a plurality of rebar truss deck plates with a plurality of rebar trusses arranged in parallel on an upper surface of a metal substrate is in a direction perpendicular to the length direction of the rebar trusses. Is used to construct a floor by transporting the floor slab unit assembled from the ground to the floor construction floor of the building, and is suspended by the traverser, the wire for lifting the traverser, and the traverser. And a lifting jig to be held. The traverser includes a pair of parallel suspension frame members positioned on the same horizontal plane, and a plurality of connection frame members that connect the suspension frame members with a distance substantially equal to the length of the deck plate with the reinforcing bar truss, A plurality of wires of the same length that hang down from a plurality of determined positions along the length direction of each suspension frame member, and a connector provided at the lower end of each wire are provided. The lifting jig is composed of a pair of end plate members, each end plate member having a detachable connecting portion to which the connecting tool is connected, and an upper side portion engaging with a reinforcing bar of each reinforcing bar truss from below. A plurality of notches to be combined are recessed.

  When the floor slab unit is transported from the ground to the floor construction floor of a building by the lifting device of the floor slab unit configured as described above, a plurality of wires are suspended from each suspension frame material of the traverser positioned above the floor slab unit. At the same time, the end plate material constituting the lifting jig is disposed along both ends of the floor slab unit and outside the end member of the reinforcing bar truss. The connecting tool at the lower end of each wire is connected to the connecting portion of each end plate material. When the traverser is lifted in a horizontal posture by a crane, the end plate materials are pulled up all at once. The floor slab unit is stably pulled up by each end plate member by engaging the notch of each end plate member with the reinforcing bar of each rebar truss from below. On the floor construction floor, after the floor slab unit is lowered between the beams, each end plate member is pulled down, and each end plate member is detached from the floor slab unit when the notches are disengaged from the reinforcing bars of each rebar truss.

  In a preferred embodiment of the present invention, the connection portion includes a connection plate attached to the end plate material so as to protrude upward from the upper side portion of the end plate material, and the connection tool is connected to the plate surface of the connection plate. However, the present invention is not limited to this. For example, the connecting portion may be formed by directly forming a through hole in the end plate material.

  In a further preferred embodiment of the present invention, each of the end plate members is engaged with an end member fixed to the end of each rebar truss of the deck plate with a rebar truss to move the end plate portion outward. A restraining member for stopping is provided.

  In this embodiment, when engaging the notch of each end plate material with the reinforcing bar of each rebar truss from below, by engaging the restraining member with the end member, the outward movement of each end plate material is prevented, Each end plate material does not fall off, and the floor slab unit can be supported safely and stably.

  According to the present invention, the floor slab unit can be suspended in a stable posture without installing a hanging hook, and can be efficiently and safely transported to the floor construction floor of the building when the floor is constructed. In addition, resources are not wasted.

It is a side view which shows the floor slab unit of the state stacked. It is a perspective view which shows the whole structure of a lifting apparatus. It is a perspective view which shows the state which made the end plate material each engage with the both ends of the upper end reinforcement of each rebar truss. It is a front view of the end plate material which a part is omitted. It is sectional drawing which shows the state by which the connection board and the restraint member were attached to the end plate material. FIG. 6 is a plan view of FIG. 5. It is a front view which shows each structure part of a lifting apparatus and a lifting apparatus. It is a side view which shows each structure part of a lifting apparatus and a lifting apparatus. It is a top view of a traverser. It is a perspective view which shows the state by which the floor slab unit was lifted by the lifting apparatus. It is a top view which shows the floor constructed by the floor slab unit. It is sectional drawing which shows the installation state to the beam of a floor slab unit. It is a front view of a deck plate with a reinforcing bar truss. It is explanatory drawing which shows the process in which the deck plate with a reinforcing bar truss is carried in. It is explanatory drawing which shows the process of assembling a floor slab unit. It is explanatory drawing which shows the process of assembling a bar. It is explanatory drawing which shows the process of binding a bar. It is explanatory drawing which shows the process of lifting a floor slab unit.

1 to 12 show a floor construction method according to the present invention, and a lifting jig 5 and a lifting device 4 for a floor slab unit used for carrying out the floor construction method. FIG. A plurality of assembled floor slab units 3 are stacked in an assembly work place.
In the floor construction method according to the present invention, the floor slab unit 3 assembled on the ground is transported from the ground to the floor construction floor of the building to construct the floor. 3 is lifted by the lifting device 4 shown in FIG. 2 and conveyed to the floor construction floor.

  In the floor construction method according to the present invention, as shown in FIG. 14 and FIG. 15, first, in the ground work place (assembly work place), a plurality of rebar trusses 11 are arranged in parallel on the upper surface of the metal substrate 10. A step of assembling the floor slab unit 3 by linking the substrate 10 in a direction orthogonal to the length direction of the reinforcing bar truss 11 with a plurality of deck plates 1 with rebar trusses is performed, and then the upper part of the assembled floor slab unit 3 The same floor slab unit 3 is made up to a height at which assembly work can be performed from the ground, and moved to another work place. The time required to create this floor slab unit is short, and it is not necessary to make a large amount of advance in the temporary storage area.

  In order to lift the uppermost floor slab unit 3 by the lifting device 4 in FIG. 2 and transport it to the floor construction floor, first, as shown by a one-dot chain line X in FIG. A plurality of end plate members 50a and 50b constituting the lifting jig 5 are arranged in the width direction in the vertical direction at the outer positions of the end members 18 at both ends along the line, and a restraining member 56 described later is engaged with the end member 18. After being combined and placed, the lower ends of a plurality of sling wires 7a and 7b constituting the lifting device 4 are connected to appropriate positions of the end plate members 50a and 50b, and the end plate members 50a and 50b are connected to the rebar trusses 11 respectively. Pull up to the position where it engages with the top muscle 13 (state shown in FIG. 3). Each sling wire 7a, 7b may be connected in advance to each end plate material 50a, 50b.

  The floor slab unit 3 shown in FIG. 3 is formed by connecting a plurality of deck plates 1 each having three reinforcing bars 11 arranged side by side on a substrate 10, but the number of connections is not limited. Note that FIG. 3 shows a structure in which three deck plates 1 are connected for convenience of illustration and explanation, but in reality, a larger number of deck plates 1 are connected, and the illustration is omitted here. Yes.

  In this embodiment, each of the end plate members 50a, 50b is connected in a straight line with three each, and has a certain thickness, and the length A is set to the width B as shown in FIG. It is a sufficiently long plate. In this embodiment, flat steel (flat bar) is used. However, the present invention is not limited to this. If each end plate material 50a, 50b is made of, for example, L-shaped steel or CT-shaped steel, the strength against bending is increased. be able to. Each of the end plate members 50a and 50b has a width direction facing up and down, and a plurality of cutout portions 52 that are engaged with the upper end bars 13 of the reinforcing bar trusses 11 from below are provided in the upper side 51 at a predetermined interval. ing. In addition, when each end plate material 50a, 50b is comprised by L-shaped steel, the bending part which makes a right angle to a lower edge is located, and when comprised by CT shape steel, a protruding item | line part is located in the width center part. The bent part and the protruding line part are positioned on the side opposite to the end member 18.

  In this embodiment, each of the end plate members 50a and 50b is connected in a straight line with three each, and in this case, the end plate members 50a and 50b that are connected need not be connected together simply by facing the end faces. Absent. In each of the end plate members 50a and 50b, the length of three connected end plates 50a and 50b is set to a length corresponding to the entire width of the floor slab unit 3 (the width in which a plurality of deck plates are connected). Each notch 52 is formed in a substantially V shape. However, the shape is not limited to this, and any U-shaped or semicircular shape may be used as long as the upper end bar 13 of the reinforcing bar truss 11 can be inserted and removed. May be.

  As shown in FIGS. 4 and 5, a plurality of connection plates 53 that protrude upward from the upper edge 51 at predetermined intervals are attached to the end plate members 50 a and 50 b by welding. A circular through hole 54 is formed on the plate surface of each connection plate 53. The connection plate 53 provided with the through hole 54 constitutes a connecting portion 55 that can detachably hook a connecting tool 70 at the lower end of sling wires 7a and 7b of the traverser 6 described later. In addition, the connection part 55 is not restricted to the thing of this embodiment, For example, the through-hole directly formed in the plate surface of the end plate material 50a, 50b may be sufficient.

  Further, at least two positions on the inner plate surfaces of the end plate members 50a and 50b, preferably at both end positions, as shown in FIGS. 5 and 6, at the end positions of the reinforcing bar trusses 11 of the deck plate 1. A hook-like restraining member 56 that is engaged with the columnar end member 18 to be fixed and stops the outward movement of the end plate members 50a and 50b is attached by welding. Each rebar truss 11 is supported by end members 18 at both ends to form a bridge. As shown in FIG. 1, the upper and lower end portions of the end members 18 at both ends are upper end bars of the rebar truss 11. 13 and the lower end bar 14 are fixed to the main steel beam.

  As shown in FIG. 6, the restraining member 56 of this embodiment is formed of an L-shaped steel plate, and one end surface is fixed to the plate surface of the end member 18 with the plate surface facing the vertical direction. . An engaging groove 57 having a groove width slightly larger than the diameter of the end member 18 is formed between the restraining member 56 and the end plate members 50a and 50b. Prior to engaging the cutout portions 52 of the end plate members 50a and 50b with the upper end bars 13 of the reinforcing bar trusses 11 from below, the end members 18 are engaged with the engagement grooves 57, and the restraining members 56 are engaged with the end members 18. Combine. As a result, the outward movement of the end plate members 50a and 50b is prevented, and the end plate members 50a and 50b are combined with the floor slab unit 3, whereby the floor slab unit 3 is placed on the end plate members 50a and 50b. It is supported stably. The restraining member 56 is not limited to the above embodiment as long as it is configured to restrain the end plate members 50a and 50b and prevent the end plate members 50a and 50b from falling off.

  In the lifting device 4 shown in FIG. 2, the notch portions 52 of the three end plate members 50a and 50b are respectively engaged with the upper end bars 13 of the reinforcing bar trusses 11 at both ends along the direction in which the substrates 10 of the floor slab unit 3 are connected. In the combined state, the end plate members 50a and 50b are lifted to the same height, and the floor slab unit 3 is transported to the floor construction floor of the building in a horizontal posture. As shown in FIGS. A traverser 6, four wire ropes 40 a to 40 d that lift the traverser 6, and a lifting jig 5 that is suspended by the traverser 6 are provided.

  The four wire ropes 40a to 40d are bundled with one thimble 41 at the upper end, while the thimble 42 is individually provided at each lower end. The thimble 41 at the upper end is connected to the lower end of a wire rope 44 suspended from a crane (not shown) via a hanging hook 43. The lower ends of the two wire ropes 40a and 40b are connected to the connecting portion 65 of one suspension frame member 61a of the traverser 6 via the thimble 42 and the shackle 45. The lower ends of the other two wire ropes 40c, 40d are connected to the connecting portion 65 of the other suspension frame member 61b of the traverser 6 via the thimble 42 and the shackle 45.

  The traverser 6 includes a pair of parallel suspension frame members 61a and 61b positioned on the same horizontal plane, and a plurality of connection frames that connect the suspension frame members 61a and 61b with a distance substantially equal to the length of the deck plate 1. A brace bar 64 provided to cross the space surrounded by the members 62 and 63, the suspension frame members 61a and 61b, and the connection frame members 62 and 63, and a plurality of the longitudinal directions of the suspension frame members 61a and 61b. A plurality of sling wires 7a and 7b having the same length that hang down from a determined position, and a connector 70 provided at the lower ends of the sling wires 7a and 7b are provided. Each of the hanging frame members 61 a and 61 b has a length corresponding to the width of the floor slab unit 3.

  Each sling wire 7a, 7b has thimbles 71, 72 at the top and bottom ends, and the top end of each sling wire 7a on one side is connected to the connecting portion 66 of one hanging frame member 61a via the thimble 71 and shackle 73, The upper end of each slinging wire 7b on the other side is connected to the connecting portion 66 of the other hanging frame member 61b via a thimble 71 and a shackle 73, respectively.

  A hook as a connecting tool 70 is attached to the thimble 72 at the lower end of each sling wire 7a, 7b. The hooks are hooked into the through holes 54 of the connection plates 53 of the end plate members 50a and 50b, so that the floor slab unit 3 is kept in a horizontal posture through the lifting jig 5 as shown in FIG. The floor slab unit 3 can be transported to the floor construction floor of the building.

  When constructing a floor of a steel structure building, after completing the temporary assembly of the building to be constructed, the floor slab unit 3 stacked in the assembly work place is lifted by the lifting device 4 in order from the uppermost one. Then, the floor slab unit 3 is sequentially positioned and fixed at the position of the floor to be constructed as shown in FIG. In the figure, 9 is a support, 91 is a large beam steel frame, and 92 is a small beam steel frame. As shown in FIG. 12, the end members 18 at both ends of each reinforcing bar truss 11 have their lower ends bent outward, and this bent portion 18 a is supported on the large beam steel frame 91 and the small beam steel frame 92. As a result, the floor slab unit 3 is positioned and fixed on the space between the beams facing the building.

  When the floor slab unit 3 is transported from the ground assembly workshop to the floor construction floor of the building by the floor slab unit lifting device 4 having the above-described configuration, the traverser 6 is positioned above the floor slab unit 3 and each suspension frame member A plurality of sling wires 7a and 7b are suspended from 61a and 61b, and three end plate members 50a and 50b constituting the lifting jig 5 are arranged along both ends of the floor slab unit 3, respectively. . At this time, the restraining members 56 of the end plate members 50 a and 50 b are engaged with the end member 18.

  Next, after connecting the hooks 70 at the lower ends of the sling wires 7a and 7b to the connecting portions 55 of the end plate members 50a and 50b, that is, through the through holes 54 of the connecting plate 53, the cranes are engaged. When the traverser 6 is lifted in a horizontal posture and the end plate members 50a and 50b are pulled up, the notch portions 52 of the end plate members 50a and 50b are engaged with the upper end bars 13 of the rebar trusses 11 from below, and then the end plate members The floor slab unit 3 is pulled up by 50a and 50b.

  On the floor construction floor, after the floor slab unit 3 is lowered onto the space between the beams, the end plate members 50a and 50b are pulled down to disengage the notches 52 from the upper end bars 13 of the rebar trusses 11. The end plate members 50a and 50b can be removed from the floor slab unit 3. The end plate members 50a and 50b are repeatedly used for transporting the floor slab unit 3. Furthermore, this type of deck plate 1 with a reinforcing bar truss is limited to a main bar pitch of 150 mm and 200 mm, and if only a few types of end plate materials 50a and 50b are prepared, it can be diverted to any site. It is not necessary to manufacture new end plate materials 50a and 50b each time. Further, the above method does not cause waste of resources because it does not use expensive steel bars that are stored in the concrete.

  According to the floor construction method described above, the end plate members 50a, 50b, 50b, the bottom plate unit 3 are engaged with the notches 52 of the end plate members 50a, 50b from below at both ends of the floor truss 11, respectively. 50b can be lifted easily and stably by the lifting device 4, and the floor slab unit 3 can be safely transported from the ground to the floor construction floor of the building. Further, the end plate members 50a and 50b are pulled down on the floor construction floor, and the notch portions 52 are disengaged from the upper end bars 13 of the rebar trusses 11 so that the end plate members 50a and 50b are easier than the floor slab unit 3. Can be removed. Thus, by using the pair of end plate members 50a and 50b as the lifting jig 5, the floor slab unit 3 can be transported and installed efficiently.

DESCRIPTION OF SYMBOLS 1 Deck plate 3 Floor slab unit 4 Lifting device 5 Lifting jig 6 Traverser 7a, 7b sling wire 10 Substrate 11 Truss 13 Upper muscle 14 Lower muscle 15 Lattice muscle 40a, 410b, 40c, 40d Wire rope 50a, 50b End plate material 51 Upper edge 52 Notch portion 53 Connection plate 54 Through hole 55 Connection portion 56 Locking piece 61a, 61b Suspension frame material 62, 63 Connection frame material 70 Connection tool

Claims (7)

A floor slab unit in which a deck plate with a plurality of rebar trusses formed by arranging a plurality of rebar trusses on the top surface of a metal substrate is assembled from the ground in a direction perpendicular to the length direction of the rebar truss. It is a method of transporting to the floor construction floor of the building and constructing the floor,
Assembling the floor slab unit in a ground workplace;
At each end of the floor slab unit along the direction in which the substrates are connected, end plate materials constituting a lifting jig are arranged, and a plurality of notches recessed in the upper side portion of each end plate material are provided for each reinforcing bar. Engaging the truss rebar from below;
A step of lifting each end plate material to the same height in a state where each notch is engaged with the reinforcing bar of each reinforcing bar truss and transporting the floor slab unit to the floor construction floor of the building in a horizontal posture;
After the floor slab unit is lowered to the floor construction floor and installed between the beams, the step of removing each end plate material from the floor slab unit by sequentially disengaging the notches and the reinforcing bars of the reinforcing bars Then, the floor construction method characterized by constructing the floor.   The floor reinforcement method according to claim 1, wherein the reinforcing bar truss includes an upper bar, a lower bar, and a lattice bar, and a notch portion of the end plate material is engaged with the upper bar from below.   Each said end plate material is a floor construction method of Claim 1 comprised by either flat steel, L-shape steel, or CT shape steel, and two or more end plate materials are connected in a linear form.   A floor slab unit in which a deck plate with a plurality of rebar trusses formed by arranging a plurality of rebar trusses on the top surface of a metal substrate is assembled from the ground in a direction perpendicular to the length direction of the rebar truss. It is a lifting jig for a floor slab unit that is transported to the floor construction floor of a building and used to construct the floor.It consists of a pair of end plate materials, and each end plate material is attached to the lower end of the wire suspended by the traverser. In addition to having a detachable connecting portion to which a connecting tool to be provided is connected, a plurality of cutout portions that are engaged with the reinforcing bars of each reinforcing bar truss of the floor slab unit from below are provided in the upper side portion. Jig for lifting floor slab unit. A floor slab unit in which a deck plate with a plurality of rebar trusses formed by arranging a plurality of rebar trusses on the top surface of a metal substrate is assembled from the ground in a direction perpendicular to the length direction of the rebar truss. A lifting device for a floor slab unit used to construct a floor by transporting it to a floor construction floor of a building,
A traverser, a wire for lifting the traverser, and a lifting jig suspended by the traverser, wherein the traverser is a pair of parallel suspension frames positioned on the same horizontal plane, and each suspension frame member A plurality of connecting frame members that are connected at a distance substantially equal to the length of the deck plate with the reinforcing bar truss, and a plurality of the same lengths that are suspended from a plurality of determined positions along the length direction of each suspension frame member A wire and a connector provided at the lower end of each wire,
The lifting jig is composed of a pair of end plate members, each end plate member having a detachable connecting portion to which the connecting tool is connected, and an upper side portion engaging with a reinforcing bar of each reinforcing bar truss from below. A lifting device for a floor slab unit in which a plurality of notches to be combined are recessed.   The connection portion includes a connection plate attached to the end plate material so as to protrude upward from an upper side portion of the end plate material, and a through hole through which the connection tool is connected is provided on a plate surface of the connection plate. Item 6. The slab unit lifting device according to Item 5.   Each of the end plate members is provided with a restraining member that engages with an end member fixed to an end portion of each rebar truss of the deck plate with a rebar truss to stop the end plate material from moving outward. 5. A lifting device for a floor slab unit according to 5.