JP2018178526A - Floor construction method, floor slab unit lifting device, and hanger for floor slab unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and safely convey a floor slab unit to a floor construction floor of a building.SOLUTION: A floor slab unit 3 assembled by joining a plurality of reinforcement truss-attached deck plates 1 having end members fitted to both end parts of reinforcement trusses 11 is lifted by a lifting device having a hanger 5, and carried from the ground to a floor construction floor of a building to construct a floor. The hanger 5 consists of at least two hanging tools 50a, 50b. The hanging tools 50a, 50b each comprise: a support frame 51 which has a length corresponding to a width of the floor slab unit 3; a coupling part 56 which is provided to the support frame 51 and can be coupled to a lower end of a wire drooped from a traverser of the lifting device; and a plurality of hook-like engagement pieces 6 which are provided to the support frame 51 to project downward, and engaged laterally with top reinforcements 13 of the respective reinforcement trusses 11 of the floor slab unit 3.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a floor construction method in which a floor construction unit is transported from the ground to the floor construction floor of a building to construct a floor, and a lifting unit for the floor construction unit used to implement the floor construction method. And the hanging device.

  Conventionally, when constructing a floor of a steel-framed building, a deck plate with rebar truss (hereinafter referred to as “rebar truss deck plate” or simply) is used after packing a predetermined number of buildings after completion of the framework of the building to be constructed A plurality of “deck plates” are lifted by a crane to the floor construction floor and temporarily placed, and after laying at the floor construction position, an operator gets on the deck plate at the site and the end of the deck plate Etc. are welded to the beam one by one. However, this type of work is "high-altitude work" defined by the "Occupational Safety and Health Law", so various facilities for preventing fall of workers and fall disaster, deck plates, work tools, etc. It is necessary to install safety equipment in the whole area below the slab to prevent it from flying and falling.

  In view of the above-mentioned problems, a method of assembling floor slab units by connecting a plurality of deck plates with rebar truss in a work place on the ground recently (referred to as "large deck deck method with rebar truss" in the field) is used. was suggested. The assembled floor plan units are carried to a temporary storage area and stacked one by one as shown in FIG. 21, and the floor plan unit 3 at the uppermost position is lifted by the lifting device 100 and carried to the floor construction floor of the building. The floor is constructed (see, for example, Patent Document 1).

  As shown in FIGS. 21 and 22, each floor slab unit 3 has a plurality of rebar trussed deck plates 1 in which a plurality of rebar truss 11 are arranged side by side at a constant distance L on the upper surface of a metal substrate 10. The boards 10 are assembled in a direction perpendicular to the longitudinal direction of the reinforcing bar truss 11. A plurality of suspension members 12 are disposed in parallel on the substrate 10 at predetermined intervals, and the upper end portions of the upper end reinforcements 13 of the respective reinforcing bar truss 11 are fixed to the lower surfaces of the top portions of the respective suspension members 12 by welding. In the following description, the floor unit 3 calls the direction in which the boards 10 are connected in a row direction, and the direction in which the reinforcing bar truss 11 extends is called a length direction.

  The rebar truss 11 includes an upper end reinforcement 13, a lower end reinforcement 14 parallel to the upper end reinforcement 13, and a lattice 15 provided between the upper end reinforcement 13 and the lower end reinforcement 14. The reinforcing bar truss 11 is supported at its both ends by the end member 16 to form a bridge. The upper and lower ends of the end members 16 at both ends are fixed to the upper end bars 13 and the lower end bars 14 of the rebar truss 11. The outwardly bent lower end is fixed to the steel frame beam.

  The floor construction method described in Patent Document 1 includes a process of assembling the floor unit 3 in a work place on the ground, and a large assembly method only outside the end members 16 at both ends along the direction in which the substrates 10 of the floor unit 3 are connected. The end plate members 102 constituting the lifting gear 101 are respectively positioned, and a plurality of notches (not shown) recessed in the upper side portion of each end plate member 102 are engaged with the upper end streaks 13 of each rebar truss 11 from below. And lifting the end plate members 102 at the same height in a state in which the notches are engaged with the upper end bars 13 and transporting the floor unit 3 to the floor construction floor of the building in a horizontal posture; The process of removing each end plate 102 from the floor unit 3 by lowering the floor unit 3 down to the floor construction floor and installing between the beams, and then releasing the engagement between each notch and the upper reinforcement 13 of each rebar truss 11 And in order.

Patent No. 6042021 gazette

  In the above-described floor construction method, each end plate 102 of the hanger 101 is engaged with the upper end streak 13 from below at the outer position of the end member 16 of each reinforcing bar truss 11. However, as shown in FIG. 23, when the lattice wire 15 of the rebar truss 11 is welded to the upper end wire 13 near the position of the end member 16, the end of the lattice wire 15 protrudes to the outside of the end member 16. It becomes difficult to reliably engage the notched portion of the end plate 102 with the outside position of the end member 16 of the upper end streak 13, and there is a possibility that the floor unit 3 may come off the end plate 102.

  This invention was made by paying attention to the above problems, and it is possible to stably lift the floor unit, and transport the floor unit to the floor construction floor of the building efficiently and safely to construct the floor. It is an object of the present invention to provide a method of constructing a floor that can be used, and a lifting device and a lifting device for a floor unit used for the implementation of the method.

  The floor construction method according to the present invention is a method of transporting a floor slab unit from the ground to a floor construction floor of a building to construct a floor, and with a rebar truss having end members attached to both ends of the rebar truss on the ground A hanging jig having a length corresponding to the width of the floor unit at a position symmetrical with respect to the center line of the floor unit at least in the step of assembling a plurality of deck plates and at least a center line of the floor unit. Of each bar-shaped engaging piece provided so as to project downward to each of the lifting jigs after lowering from above at a location not in contact with the rebar of each rebar truss, and In the process of engaging with the reinforcing bars and lifting the lifting jigs at the same height with the engaging pieces engaged with the reinforcing bars of each reinforcing bar truss, the floor construction of the building with the floor unit in a horizontal posture Transport to the floor, and After the plate unit is lowered to the floor construction floor and installed between the beams, the steps of removing the respective lifting jigs from the floor plate unit are sequentially carried out by releasing the engagement between the respective engagement pieces and the rebars of each rebar truss To build a floor.

  Here, the "center line of the floor unit" is an imaginary line passing a half of the length of the floor unit. Moreover, "the length of the floor deck unit" refers to the dimension along the direction (longitudinal direction) in which the reinforcing bar truss 11 of the deck plate with the reinforcing bar truss extends, and the "width of the floor slab unit" is the deck with the reinforcing bar truss It refers to the dimension along the direction (width direction) in which the substrates of the plate are connected.

  According to the floor construction method of the present invention, at least at a position symmetrical with respect to the center line of the floor slab unit and at a position inside the end member, the hook-shaped engaging pieces of each lifting jig are After lowering from above at a location not in contact with the reinforcing bar, by engaging the reinforcing bar from the side and lifting up each lifting jig to the same height, the shape of the flat floor plan unit is not changed The floor unit can be transported from the ground to the floor construction floor of the building. In this case, since each suspension jig is engaged with the rebar of each rebar truss at the inner position of the end member, the engagement piece reliably engages with the rebar, and there is a possibility that the floor unit may come off from the suspension jig Absent. In addition, the lifting jig can be removed from the floor unit by pulling down the lifting jigs on the floor construction floor and releasing the engagement between the engagement pieces and the reinforcing bars of the reinforcing bar truss.

  In a preferred embodiment, the rebar truss includes an upper end bar, a lower end bar and a lattice bar, and the upper end bar is engaged with the engagement piece of the lifting jig from the side, but for the manufacture of a floor unit The rebar truss of the deck plate with rebar truss to be used is not limited to the one described above.

  The floor deck unit lifting apparatus according to the present invention transports a floor deck unit assembled by arranging a plurality of deck plates with rebar truss with end members attached to both ends of the rebar truss from the ground to the floor construction floor of the building. It is used to construct a floor and includes a traverser, a wire for lifting the traverser, and a lifting device suspended by the traverser. The traverser comprises at least two parallel suspended suspension members positioned on the same horizontal surface, and a plurality of wires of the same length suspended from a plurality of determined positions along the length direction of each suspension member. , And a connector provided at the lower end of each wire. The hanging tool comprises at least two hanging jigs disposed at positions axisymmetrical to at least a center line of the floor slab unit and at a position inside the end member. Each lifting jig has a length corresponding to the width of the floor slab unit, and a plurality of hook-shaped engaging members respectively engaged with the connecting portion capable of connecting with the connecting tool and the reinforcing bars of each reinforcing bar truss It is equipped with a piece.

  In addition, according to the present invention, the lifting gear of the floor slab unit according to the present invention is a floor slab unit assembled by arranging a plurality of deck plates with reinforcing bar truss having end members attached to both ends of the reinforcing bar truss. It is used to transport and construct a floor and comprises at least two lifting jigs. Each of the suspension jigs has a support frame having a length corresponding to the width of the floor slab unit, a connecting portion which can be connected to the lower end of a wire provided on the support frame and suspended from a traverser of a lifting device, And a plurality of hook-shaped engaging pieces provided on the supporting frame so as to project downward and respectively engage with the reinforcing bars of the reinforcing bar trusses of the floor board unit.

  When the floor unit is transported from the ground to the floor construction floor of the building by the lifting device and lifting implement of the floor unit having the above-described configuration, a plurality of suspension frame members of the traverser positioned above the floor unit are used. The wire is suspended, and the respective suspension jigs of the hangers are engaged at a position symmetrical with respect to at least a center line of the floor slab unit and at a position inside the end member. In this case, the connecting tool at the lower end of each wire is connected to the connecting portion of each hanging jig. When the traverser is lifted in a horizontal posture by a crane, each lifting jig is pulled up at the same time, but since the engagement pieces of each lifting jig are engaged with the reinforcing bars of each reinforcing bar truss, the floor slabs by each lifting jig The unit can be pulled up stably. At the floor construction floor, after lowering the floor unit between beams, pull down each lifting jig and release the engagement between each engagement piece and each rebar truss, so that each lifting jig is from the floor unit Get out.

  In a preferred embodiment, the support frame of the suspension jig is formed of any of flat steel, L-shaped steel, T-shaped steel and square steel pipe, but is not limited thereto.

  In a preferred embodiment, the connecting portion is provided with a through hole in a plate surface of a connection plate provided to project upward from the support frame, but the invention is not limited to this. The connecting portion may be configured by directly forming a through hole in the support frame.

  The hanger of the floor slab unit according to the present invention further includes a restraint member supported by the support frame. The restraining member is provided with a leg portion which protrudes to a position intersecting with the rebar of any rebar truss and stops the movement of the support frame in the direction in which the rebar and the engagement piece are disengaged.

  According to this hanger, after engaging the engagement pieces of the respective lifting jigs with the reinforcing bars of the respective rebar truss from the side, when the leg portions of the restraint member are intersected with the reinforcing bars, engagement between the reinforcing bars and the engaging pieces Since the movement of the support frame in the direction of disconnection is prevented, there is no risk of the engagement between the suspension jigs and the reinforcing bars being disengaged, and the floor slab unit is safely and stably supported by the suspension jigs.

  Although various forms can be considered as the restraint member, one embodiment is a reinforcing bar in a state in which the base end portion supported by the support frame and the fork extending from the base end portion sandwich the reinforcing bar from both sides And one other embodiment is a head supported by the support frame, and a single head extending straight from the head and intersecting the rebar. And a leg.

  According to the present invention, since each suspension jig is at least axisymmetrically positioned with respect to the center line of the floor unit and reliably engaged with the rebar at the position inside the end member, the floor unit is stabilized. The floor unit can be transported to the floor construction floor of the building efficiently and safely, and the floor can be constructed.

It is a top view for demonstrating the position of the suspension jig with respect to a floor slab unit. It is a top view for demonstrating the position of the suspension jig with respect to the floor slab unit of other embodiment. It is a perspective view showing the floor slab unit of other embodiments. It is a front view for demonstrating the position of the suspension jig with respect to the floor slab unit of embodiment of FIG. It is a perspective view which shows schematic structure of a lifting apparatus. It is a front view showing one embodiment of a suspension jig. It is a front view which shows the state which engaged the engagement piece and the restraint member to the structure of the suspension jig of one Embodiment, and the upper end muscle. It is sectional drawing in alignment with the AA of FIG. It is a side view which shows the state which engaged the engagement piece and the restraint member with the structure of the suspension jig of other embodiment, and the upper end muscle. It is a side view which shows the state which engaged the engaging piece and the restraining member with the structure of the suspension jig of other embodiment, and the upper end muscle. It is a side view which shows the state which engaged the engaging piece and the restraining member with the structure of the suspension jig of other embodiment, and the upper end muscle. It is a front view which shows the structure each part of a lifting apparatus. It is a side view which shows the state which engaged the engagement piece and the restraint member with the structure of other embodiment, and the upper end muscle. It is sectional drawing in alignment with the BB line of FIG. It is a side view which shows the state which engaged the engaging piece and the restraint member with the structure of other embodiment, and the upper end muscle. It is sectional drawing which follows the CC line of FIG. It is a side view which shows the state which engaged the engaging piece and the restraint member with the structure of other embodiment, and the upper end muscle. It is a side view which shows the state which engaged the engaging piece and the restraint member with the structure of other embodiment, and the upper end muscle. It is sectional drawing in alignment with the DD line of FIG. It is a perspective view which shows an example of the manufacturing method of an engagement piece. It is a side view showing a deck unit in a stacked state. It is a front view of a deck plate with rebar truss. It is a side view showing composition near the end member of rebar truss.

FIG. 1 is a plan view of a floor deck unit 3 assembled by connecting a plurality of deck plates 1 with rebar truss in a work place on the ground. The floor unit 3 is transported from the ground to the floor construction floor of the building and the floor is constructed. In addition, in FIG. 1, the dashed-dotted line has shown the beam in a floor construction floor.
When lifting the floor unit 3 by the lifting device 4 described later, the deck plate 1 is located at a position symmetrical with respect to the center line c of the floor unit 3, that is, at a position equidistant A from the center line c The lifting jigs 50a and 50b of the hanging tool 5 dedicated to the large assembly method are positioned at positions inside the position P of the end member 16 described above. The deck unit 3 is hooked and supported by the respective hanging jigs 50a and 50b, and is lifted.

  FIG. 2 is a plan view of the floor slab unit 3 assembled using the deck plate 1 whose overall length is longer than that of the deck plate 1 used in the embodiment of FIG. In order to lift the floor unit 3 of FIG. 2, the lifting jig 50c is positioned on the center line c of the floor unit 3, and the position symmetrical with respect to the center line c, ie, equidistant from the center line c. Hanging jigs 50a and 50b of the hanger 5 are positioned at a position B and at a position inside the position P of the end member 16 of the deck plate 1. The deck unit 3 is hooked and supported by the respective hanging jigs 50a, 50b, 50c, and is lifted. In addition, in FIG. 2, the dashed-dotted line has shown the beam in a floor construction floor.

  FIG. 3 and FIG. 4 show the floor slab unit 3 in which the small beam 31 is fixed between the pair of structures 30 and 30 assembled by connecting a plurality of deck plates 1 as a force frame. In addition, in the figure, the rebar truss 11 of the deck plate 1 is abbreviate | omitting illustration. In order to lift the floor unit 3, the position of the small beam 31 is regarded as a central line c, and the position is symmetrical with respect to the central line c, that is, a position equidistant D from the position of the small beam 31 The lifting jigs 50a and 50b for the large-assembling method-specific hanging tool 5 are positioned at positions inside the position P of the end member 16 of the deck plate 1, respectively, preferably at the position of the small beam 31. Position the tool (not shown). The deck unit 3 is hooked and supported by the respective lifting jigs 50a and 50b dedicated to the large assembly method and the lifting tool for lifting the small beam, and is lifted. In addition, FIG. 3 shows the floor slab unit 3 constructed in the floor construction floor, and in the figure, 2 is a large beam in the floor construction floor. Further, FIG. 4 shows the floor unit 3 assembled on the ground, and in the figure, 20 is a temporary construction frame for ground construction installed in a work place on the ground.

  In order to transport the floor deck unit 3 from the ground to the floor construction floor of the building to construct a floor, first, the floor deck unit 3 is assembled by connecting a plurality of deck plates 1 with rebar truss at a work site on the ground. Next, the assembled floor deck unit 3 is stacked as needed within the range of height at which workers can stand and work on the ground, and the lifting gear 5 is placed at a predetermined position of the top floor deck unit 3. The lifting jigs 50a and 50b are respectively positioned, and a plurality of hook-shaped engaging pieces 6 (shown in FIG. 6) described later are engaged with the upper end streaks 13 of the reinforcing bar truss 11 from the side. Next, the lifting jigs 50a and 50b of the lifting gear 5 are lifted to the same height by the traverser 40 of the lifting device 4 shown in FIG. 5, and the floor unit 3 is transported to the floor construction floor of the building in a horizontal posture. Lower the floor unit 3 to the floor construction floor and install it between the beams. Thereafter, the lifting jigs 50a and 50b are removed from the floor unit 3 by releasing the engagement between the engagement pieces 6 and the upper end reinforcements 13 of the reinforcing bar truss 11.

  The specific configuration of the floor unit 3 is the same as that shown in FIGS. 21 and 22, and the description thereof is omitted here. In addition, although the floor slab unit 3 shown in FIGS. 1 and 2 is formed by connecting a plurality of deck plates 1 in which three reinforcing bar truss 11 are arranged in parallel on the substrate 10, the arranging of the reinforcing bar truss 11 is arranged in parallel The number and the connected number of deck plates 1 are not limited at all.

  The lifting device 4 shown in FIG. 5 includes a traverser 40 in which a plurality of sling wires 41 are suspended. At the lower end of each hooking wire 41, a hook as a connector 42 is attached. The connector 42 is connected to the lifting jigs 50 a and 50 b of the hanger 5. The engagement pieces 6 of the lifting jigs 50 a and 50 b are hooked on the upper end bars 13 of the reinforcing bar truss 11 of the floor unit 3.

  The traverser 40 has a rectangular shape that substantially matches the outer shape of the floor unit 3, and includes two parallel hanging frame members 43 a and 43 b having a length corresponding to the width of the floor unit 3, and a hanging frame It includes two connecting frame members 44 which connect between both ends of the members 43a and 43b at a distance corresponding to the length of the floor slab unit 3, and connecting frame members 45 provided at a plurality of intermediate places. The lower ends of a plurality of wire ropes 46 suspended from a crane (not shown) are connected to the suspension frame members 43a and 43b.

  Each of the hanging jigs 50a and 50b constituting the hanging member 5 is one in which three hanging jigs 50 shown in FIG. 6 are linearly connected. Each of the suspension jigs 50a and 50b may be configured by one suspension jig 50, or may be configured by connecting two or four or more suspension jigs 50. Good. The lifting jig 50 has a sufficiently long support frame 51. Although the support frame 51 of this embodiment is formed using two flat steels (flat bars), in order to enhance the strength against deflection, it is formed using an L-shaped steel as in the embodiment described later. Furthermore, you may form using T-shaped steel. The support frame 51 is provided with a plurality of wedge-shaped engagement pieces 6 at predetermined intervals so as to protrude downward. The three lifting jigs 50 are connected in a straight line so that the end faces are butted, but it is not necessary to connect the end faces. The length of the three hanging jigs 50 is approximately the same as the width of the floor unit 3.

  As shown in FIGS. 7 and 8, the support frame 51 of each of the suspension jigs 50 a and 50 b is one in which a vertical plate portion 53 is joined to the center of the upper surface of the horizontal plate portion 52. The horizontal plate portion 52 and the vertical plate portion 53 are formed of flat steel. A plurality of connecting plates 54 protruding upward are attached to the upper end surface of the vertical plate portion 53 by welding. A circular through hole 55 is formed on the plate surface of each connection plate 54. The connection plate 54 provided with the through hole 55 constitutes a connection portion 56 capable of connecting the connection tool 42 at the lower end of the beading wire 41 of the traverser 40. In addition, the connection part 56 is not restricted to the thing of this embodiment, For example, what formed the through-hole directly in the perpendicular | vertical board part 53 may be used.

  A plurality of hook-shaped engaging pieces 6 are attached to the lower surface of the horizontal plate portion 52 of the support frame 51 by welding so as to protrude downward. The attachment intervals of the engagement pieces 6 coincide with the intervals of the reinforcing bar truss 11. Each engaging piece 6 is a plate-like body, and is formed by cutting a steel plate by cutting processing such as gas fusion cutting, etc., and has a large vertical portion 61 of width (horizontal width) and horizontal of small width (vertical width) And 62 in series. The width of the horizontal portion 62 is set to half or less of the distance between the upper end streak 13 and the lower end streak 14. An engagement groove 63 is formed between the lower surface of the horizontal plate portion 52 of the support frame 51 and the horizontal portion 62 of the engagement piece 6 so that the upper end reinforcement 13 of the rebar truss 11 enters and engages.

  Although the engaging piece 6 in this embodiment is L-shaped in which the horizontal portion 62 is perpendicular to the vertical portion 61, the horizontal portion 62 has an angle smaller than 90 degrees with respect to the vertical portion 61. It may also be in the form of a curved J. Also, the engagement pieces 6 do not necessarily have to be provided corresponding to the upper end streaks 13 of all the reinforcing bar truss 11. For example, design changes such as providing corresponding to the upper end bars 13 of the rebar truss 11 on both sides of the deck plate 1 are also possible.

  In the vertical plate portion 53 of the support frame 51, a mounting plate 57 having a mounting hole 58 is vertically mounted at each position where the engagement piece 6 is provided. Restraining members 7 are attached to each mounting plate 57 in a freely retractable manner. The restraint member 7 in the illustrated example is formed by bending a steel bar, and is supported by being inserted into the mounting hole 58 of the mounting plate 57. The restraint members 7 do not necessarily have to be provided at the positions of all the engagement pieces 6, and for example, as shown in FIG. The restraining member 7 in the illustrated example has a U-shape, and has a proximal end 71 supported freely in the mounting hole 58 of the mounting plate 57 in an undulating manner, and two legs extending bifurcatedly from both ends of the proximal end 71. The units 70, 70 are integrally provided. The proximal end 71 is bent substantially at right angles to the leg 70.

  When the restraint member 7 falls by 90 degrees from the state shown by the alternate long and short dash line in the drawing and the two leg portions 70 hang down, each leg portion 70 sandwiches the upper end streak 13 of the rebar truss 11 and the upper end It crosses the muscle 13 and the restraining member 7 is engaged with the upper muscle 13. The restraint member 7 restrains the upper end streak 13 to prevent the support frame 51 from moving in the direction in which the engagement between the upper end streak 13 and the engagement piece 6 is released.

  In this embodiment, seven restraint members 7 are provided for one suspension jig 50 (see FIG. 6), but all the restraint members 7 are interlocked to move the legs 70 up and down all at once. All the restraint members 7 are connected by the connection member 72 which consists of steel bars. The restraint member 7 is not limited to the above embodiment as long as the restraint member 7 can restrict the movement of the support frame 51. Other embodiments will be described later.

In order to further enhance the strength of the support frame 51, as shown in FIGS. 9 and 10, the support frame 51 may be formed using an L-shaped steel. Each engagement piece 6 is attached by welding to the lower surface of the horizontal plate 52 of L-shaped steel in the embodiment shown in FIG. 9 and to the side surface of the vertical plate 53 of L-shaped steel in the embodiment shown in FIG. ing. In the embodiment shown in FIG. 10, each engaging piece 6 is welded to the side surface of the vertical plate portion 53 so that the horizontal portion 62 (see FIG. 8) is in the horizontal posture. The engagement piece 6 may be attached at an angle so that the position of the engagement piece 6 is directed obliquely upward. Further, the support frame 51 may be formed using a square steel pipe as shown in FIG. 11 in place of the flat steel, L-shaped steel and T-shaped steel.
In each of the embodiments of FIGS. 9 to 11, the other configurations are the same as those of the embodiments shown in FIGS. 7 and 8. Here, the corresponding configurations are denoted by the same reference numerals, and the description thereof will be omitted.

  The configuration of the lifting device 4 shown in FIG. 5 will be described in more detail based on FIGS. 5 and 12. The lifting device 4 includes at least four wire ropes 46 for lifting the traverser 40. The upper ends of the four wire ropes 46 are bundled into one thimble 8, while the lower ends of the four wire ropes 46 are individually provided with thimbles 80 respectively. The upper end thimble 8 is connected to the lower end of a wire rope (not shown) hung from a crane via a suspension ring 81. The lower ends of the two wire ropes 46 are connected via the thimble 80 and the shackle 82 to the connection portion 47 of one of the suspension members 43 a of the traverser 40. The lower ends of the other two wire ropes 46 are connected via the thimble 80 and the shackle 82 to the connection portion 47 of the other suspension member 43 b of the traverser 40.

  The traverser 40 includes a pair of mutually parallel extending frame members 43a and 43b positioned on the same horizontal plane, and a hooked wire having the same length from a plurality of determined positions along the length direction of each of the extending frame members 43a and 43b. 41 is hanging down. Each ball hook wire 41 is provided with thimbles 83 and 84 at upper and lower ends, and the upper end of each ball hook wire 41 on one side is connected to the connecting portion 48 of one of the suspension frame members 43 a via the thimble 83 and the shackle 85. The upper end of each side hooking wire 41 is connected to the connecting portion 48 of the other suspension frame member 43b via the thimble 83 and the shackle 85, respectively.

  A hook as a connector 42 is attached to the thimble 84 at the lower end of each hooking wire 41. Each hook is hooked to the through hole 55 of each connection plate 54 of each of the suspension jigs 50a and 50b, so that the floor unit 3 can be suspended in a horizontal posture via the hanger 5. The floor unit 3 can be transported to the floor construction floor.

  FIGS. 13-19 show other embodiments of the restraint member 7 that constitutes the hanger 5. The restraint member 7 shown in FIGS. 13 and 14 is in the form of a bolt and has a head 73 supported by a support hole 52a formed in the horizontal plate portion 52 of the support frame 51 made of L-shaped steel. And one leg 74 which extends straight downward from the head 73 and intersects the top bar 13 of the rebar truss 11. The leg 74 crosses the upper end streak 13 and the restraint member 7 restrains the upper end streak 13 to prevent the support frame 51 from moving in the direction in which the engagement between the upper end streak 13 and the engagement piece 6 is released. Ru. In the figure, reference numeral 75 denotes a wire connecting the head 73 and the support frame 51, and is for preventing the restraint member 7 from being lost.

  In the embodiment shown in FIGS. 15 and 16, the support plate 59 is attached to the horizontal plate portion 52 of the support frame 51 made of flat steel, and the head 73 of the restraint member 7 is supported in the support hole 59a formed in the support plate 59. It is The other configuration is the same as the embodiment of FIGS. 13 and 14. Further, in the above two embodiments, the configuration of the engagement piece 6 etc. is the same as the embodiment shown in FIG. 7 and FIG. 8, and the explanation will be omitted by attaching the same reference numerals to the corresponding configurations. . The support frame 51 can also be formed using a square steel rod as shown in FIG. 17 instead of a flat steel or L-shaped steel.

  In the embodiment shown in FIGS. 18 and 19, the support plate 59 is attached to the horizontal plate portion 52 of the support frame 51, and the base end portion 71 of the restraint member 7 is supported by the support hole 59a provided in the support plate 59. In the illustrated restraining member 7, the base end portion 71 doubles as the connecting member 72 described above, and extends over the entire length of the support frame 51. The base end portion 71 is formed of an L-shaped steel. Two pairs of leg portions 70 extend at a predetermined interval from the base end portion 71 in a bifurcated manner and intersect with the upper end muscle 13 with the upper end muscle 13 of each rebar truss 11 being sandwiched from both sides . The support frame 51 is moved in the direction in which the engagement between the upper end streak 13 and the engagement piece 6 is released by the two leg portions 70 crossing the upper end streak 13 and the restraint member 7 restraining the upper end streak 13. Is blocked.

  In each of the above-described embodiments, a steel plate cut into an L shape, a J shape, a reed shape or the like by melting is used as the engagement piece 6 of the suspension jigs 50a and 50b. Not limited to this, for example, as shown in FIG. 20, it is also possible to use an L-shaped steel 65 cut at a predetermined width in a direction orthogonal to the longitudinal direction by a cutting device 66. According to this embodiment, since the inner surface of the bent portion 64 has a rounded shape and is thick, the strength of the bent portion 64 is enhanced.

  When constructing a floor of a steel-framed building, after completing the temporary assembly of the building to be constructed, lift the floor deck units 3 stacked in the assembly work place from the uppermost one by the lifting device 4 in order It transfers to the floor construction floor of a building, and, as shown in FIGS. 1-3, it locates the floor slab unit 3 in the position of the floor which should be constructed. Lower end portions of the end members 16 at both ends of each rebar truss 11 are bent outward, and the bent portions are supported on the large girder steel frame and the small girder steel frame, so that the space between the opposing beams of the building The floor unit 3 is positioned and fixed on the top.

  When the floor unit 3 is transported from the work place on the ground to the floor construction floor of the building by the lifting device 4, the traverser 40 is positioned above the floor unit 3 and a plurality of ball hooking wires are arranged from the hanging frame members 43a and 43b. Drop 41 down. In the floor slab unit 3 shown in FIG. 1, the hanging jigs 50a and 50b constituting the hanging member 5 are arranged along a line symmetrical position with respect to the center line c and at a position inside the position P of the end member 16. After making the hook-shaped engaging pieces 6 of the respective lifting jigs 50a and 50b descend from above and engaging with the upper end muscle 13 from the side Each restraint member 7 is engaged with the upper end muscle 13 from above.

  Next, after hooking the connecting tool (hook) 42 at the lower end of each sling wire 41 to each connecting portion 56 of each lifting jig 50a, 50b, ie, the through hole 55 of the connecting plate 54, the traverser 40 is leveled by a crane. Lifting with the posture, the lifting jigs 50a and 50b are lifted to the same height. Thus, the floor unit 3 can be transported from the ground to the floor construction floor of the building without changing the shape of the flat floor unit 3.

  In the floor construction floor, after lowering the floor unit 3 onto the space between the beams, the respective hanging jigs 50a, 50b are pulled down, and the engagement between each restraint member 7 and each upper end bar 13 of the rebar truss 11 and each engagement The lifting jigs 50 a and 50 b can be removed from the floor unit 3 by releasing the engagement between the pieces 6 and the upper end streaks 13.

  According to the above-described floor construction method, each suspension jig is placed on the upper end streak 13 of each rebar truss 11 at a position symmetrical with respect to the center line c of the floor slab unit 3 and inside the position P of the end member 16 By engaging the respective engaging pieces 6 of 50a and 50b from the side and engaging the restraint member 7 from above, it is possible to lift the respective hanging jigs 50a and 50b in an easy and stable state, and the floor The plate unit 3 can be safely transported from the ground to the floor construction floor of the building. Moreover, each hanging jig 50a, 50b is pulled down by pulling down each hanging jig 50a, 50b in the floor construction floor, and releasing each engaging piece 6 and each restraint member 7 from the upper reinforcement 13 of each reinforcing bar truss 11, The 50b can be easily removed from the floor unit 3. As described above, by using at least two lifting jigs 50 a and 50 b as the lifting tool 5, transportation and installation of the floor unit 3 can be efficiently performed.

DESCRIPTION OF SYMBOLS 1 Deck plate with rebar truss 3 Floor plate unit 4 Lifting device 5 Lifting device 6 Lifting device 6 Engagement piece 7 Restraint member 10 Substrate 11 Truss 13 Upper end line 14 Lower end line 15 Latticed line 16 End member 40 Traverser 41 Jasper wire 42 Connector 43a, 43b Hanging frame material 50, 50a, 50b, 50c Hanging jig 51 Support frame 56 Connecting part 70 Leg part 71 Base end part 73 Head part 74 Leg part

The floor deck unit lifting apparatus according to the present invention transports a floor deck unit assembled by arranging a plurality of deck plates with rebar truss with end members attached to both ends of the rebar truss from the ground to the floor construction floor of the building. And a wire for lifting the traverser, and a lifting device suspended by the traverser, the traversers being at least two parallel to each other and positioned on the same horizontal plane. It is provided with a book hanging frame material, a plurality of wires of the same length suspended from a plurality of determined positions along the length direction of each hanging frame material, and a connector provided at the lower end of each wire . The hanging tool comprises at least two hanging jigs disposed at positions axisymmetrical to at least a center line of the floor slab unit and at a position inside the end member. Each hanging jig comprises a support frame having a length corresponding to the width of the floor slab units, and connecting the linkage part between the connector of the traverser provided on the supporting frame, downwardly to the support frame And a plurality of wedge-shaped engagement pieces provided to project and engage with the rebars of the respective rebar trusses of the floor slab unit .

Claims (9)

It is a method of transporting a floor deck unit from the ground to the floor construction floor of a building to construct a floor,
Assembling a plurality of rebar trussed deck plates having end members attached to both ends of the rebar truss on the ground;
A lifting jig of a length corresponding to the width of the floor unit is positioned at a position symmetrical to at least the center line of the floor unit at a position symmetrical to the center line of the floor unit, A plurality of wedge-shaped engaging pieces provided so as to project downward are lowered from above at locations not in contact with the reinforcing bars of each rebar truss, and then engaged with the reinforcing bars from the side;
A step of lifting the lifting jig to the same height with the engaging pieces engaged with the reinforcing bars of each rebar truss, and transporting the floor plan unit to the floor construction floor of the building in a horizontal attitude;
The floor deck unit is lowered to the floor construction floor and installed between the beams, and then the lifting jigs are removed from the floor slab unit by releasing the engagement between the engagement pieces and the reinforcing bars of the rebar trusses. The floor construction method characterized by carrying out a floor sequentially by carrying out.   The floor construction method according to claim 1, wherein the rebar truss includes an upper end bar, a lower end bar and a lattice bar, and the engagement piece of the lifting jig is engaged with the upper end bar. A lifting device used to construct a floor by transporting a floor deck unit assembled from a ground floor to a floor construction floor of a building by assembling a plurality of deck plates with reinforcing bar truss with end members attached to both ends of the rebar truss. And
A traverser, a wire for lifting the traverser, and a lifting device suspended by the traverser, the traverser comprising at least two suspension members parallel to each other and positioned on the same horizontal surface, and lengths of the respective suspension members A plurality of wires of the same length suspended from a plurality of determined positions along the direction, and a connector provided at the lower end of each wire;
The lifting device comprises at least two lifting jigs disposed at positions axisymmetrical to at least a center line of the floor slab unit and at a position inside the end members, each lifting jig being And a connecting portion having a length corresponding to the width of the floor slab unit and capable of connecting with the connecting tool, and a plurality of hook-shaped engaging pieces respectively engaged with the reinforcing bars of each reinforcing bar truss The lifting device of the floor unit   A floor slab unit used to construct a floor by transporting a floor deck unit assembled from the ground from the ground to a floor construction floor of a building by assembling a plurality of deck plates with reinforcing bar truss with end members attached to both ends of the rebar truss. A lifting device for a unit, comprising at least two lifting jigs, each lifting jig comprising a support frame having a length corresponding to the width of the floor plan unit, and a lifting device provided on the support frame A connection part which can be connected to the lower end of the wire suspended from the traverser, and a plurality of wedge-shaped members provided so as to project downward to the support frame and respectively engaged with the rebars of each rebar truss of the floor slab unit A hanger for a floor unit comprising an engagement piece.   5. The lifting gear for a floor slab unit according to claim 4, wherein the support frame of the lifting jig is formed of any of flat steel, L-shaped steel, T-shaped steel, and square steel pipe.   The hanger for a floor slab unit according to claim 4, wherein the connection portion is provided with a through hole on a plate surface of a connection plate provided to project upward from the support frame.   The suspension unit for a floor slab unit according to any one of claims 4 to 6, further comprising a restraint member supported by the support frame, wherein the restraint member intersects the rebars of any rebar truss A suspension unit for a floor slab unit comprising a leg that protrudes to a position where the support frame stops moving in a direction in which the reinforcing bar and the engagement piece are disengaged.   The restraining member includes a base end supported by the support frame, and two legs extending from the base end in a bifurcated manner and intersecting the bar in a state in which the bar is sandwiched from both sides The hanger for a floor slab unit according to claim 7, which is   8. The floor slab unit according to claim 7, wherein the restraint member includes a head supported by the support frame, and a single leg extending straight from the head and intersecting the reinforcing bar. Hanging accessories.