Installation Method of Construction Jig and Spacer

Abstract

To reduce a work load of installing a spacer on a deck plate.SOLUTION: A construction jig 1 rotates a metal spacer 300 that supports, at a valley bottom 220, a reinforcing bar 400 arranged in a longitudinal direction L on a deck plate 200 having a wave shape formed by consecutively arranging a plurality of crests 210 and the valley bottom 220 that are continuous with each other via an inclined portion 230, and installs the spacer on the deck plate 200. The construction jig 1 includes: a cylindrical member (engagement member) 10 that engages with a pair of leg portions 320 of the spacer 300 that engage with the respective opposing inclined portions 230 so as not to rotate relative to each other; and an operation member 30 that is integrally formed with the cylindrical member 10 and rotates the cylindrical member 10 in a state of being engaged with the spacer 300 to lock the pair of leg portions 320 of the spacer 300 to the inclined portions 230.SELECTED DRAWING: Figure 4A

Description

Technical Field

[0001] The present invention relates to a construction jig and a method for installing a spacer.

Background Art

[0002] Conventionally, there is known a spacer for reinforcing bars that supports reinforcing bars on a deck plate having a peak portion, a valley portion, and an inclined portion connecting these, and having a corrugated cross-section intersecting in the longitudinal direction, which is used in a composite slab structure (see, for example, Patent Document 1). The spacer of Patent Document 1 is configured by combining two sets of gate-shaped configurations each having two support legs and two placement portions. Each gate supports a load such as a wire mesh, and as a whole, the load is dispersed to the four support legs.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] FIG. 3 is a diagram showing an example of a spacer 300. There is known a spacer 300 formed of a steel plate, which includes a support portion 310, a pair of leg portions 320, and a pair of engagement portions 330. Such a spacer 300 is installed on a deck plate, for example, at a site where a composite slab structure using a predetermined deck plate is constructed.

[0005] The spacer 300 is adapted to engage with the deck plate at the engagement portion 330, and it was necessary for an operator to engage and install each of the plurality of spacers 300 at the site with the deck plate. The work of installing (locking) the spacer 300 to the deck plate is a heavy burden on the operator, and there is a need to improve work efficiency.

[0006] Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a technique for reducing the work load of installing a spacer on a deck plate.

Means for Solving the Problems

[0007] A construction jig according to the present invention for solving the above problems is a construction jig for installing a spacer that supports a reinforcing bar arranged in the longitudinal direction at a valley bottom portion in a deck plate in which a plurality of peak portions and valley bottom portions that are continuous with each other via inclined portions form a wave shape, and rotates the spacer to install it on the deck plate. The construction jig is characterized by including an engaging member that engages non-rotatably with a pair of leg portions of the spacer that engage with respective opposing inclined portions, and an operating member that is integrally formed with the engaging member and rotates the engaging member in a state of being engaged with the spacer to lock the pair of leg portions to the inclined portions.

[0008] In the construction jig according to one aspect of the present invention, the engaging member may be a cylindrical member having a rectangular cross-section with one end open and the other end closed by the operating member, and may be formed to be capable of accommodating at least a part of the spacer.

[0009] In the construction jig according to one aspect of the present invention, the engaging member may be formed to be capable of accommodating a plurality of spacers.

[0010] In the construction jig according to one aspect of the present invention, the operating member may have an extending portion that extends from the engaging member in a direction opposite to the spacer, and a gripping portion that extends intersecting the extending portion at an end on the side opposite to the engaging member.

[0011] In the construction jig according to one aspect of the present invention, the operating member may have a gripping portion that extends in a direction intersecting the direction in which the engaging member engages with the spacer.

[0012] Furthermore, the construction jig according to the present invention for solving the above problems is a construction jig for installing a reinforcing bar arranged in the longitudinal direction in a deck plate having a plurality of crest portions and trough portions that are continuous with each other via inclined portions and form a waveform, by rotating a spacer that supports the reinforcing bar at the trough portion and installing it on the deck plate. The construction jig includes an engaging portion that engages non-rotatably with a pair of leg portions of the spacer that engage with respective opposing inclined portions, and a clamping portion that is formed integrally with the engaging portion and clamps one of the pair of leg portions in its width direction between the engaging portion. The construction jig is characterized by rotating the engaging portion in a state where it is engaged with the spacer to lock the pair of leg portions to the inclined portions.

[0013] The method for installing a spacer according to the present invention for solving the above problems is an installation method for installing a spacer that supports a reinforcing bar arranged in the longitudinal direction in a deck plate having a plurality of crest portions and trough portions that are continuous with each other via inclined portions and form a waveform, by rotating the spacer and installing it on the deck plate. The installation method includes a temporary placement step of temporarily placing the spacer at the trough portion, an engagement step of engaging a construction jig with the spacer installed at the trough portion, and a rotation step of rotating the construction jig in a state where it is engaged with the spacer. By rotating the construction jig in the rotation step, a pair of leg portions of the spacer are locked to respective opposing inclined portions.

Effects of the Invention

[0014] According to the present invention, the work burden of installing the spacer on the deck plate can be reduced.

Brief Description of the Drawings

[0015]

Figure 1A

Figure 1B

Figure 2

Figure 3

Figure 4A

Figure 4B

Figure 5A

Figure 5B

Figure 5C

Figure 5D

Figure 6

Figure 7

Figure 8A

Figure 8B

Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are given to the common components in each embodiment, and repeated descriptions are omitted. Also, note that the drawings are schematic, and it is necessary to be aware that the dimensional relationships and ratios of the respective elements may be different from reality. There may also be parts where the dimensional relationships and ratios are different between the drawings.

[0017] [Composite Slab] FIG. 1A is a view showing a composite slab 100 using a deck plate 200 with a spacer according to this embodiment. FIG. 1B is a perspective view showing the composite slab 100 with the concrete part 600 partially removed. The composite slab 100 according to this embodiment is used, for example, for the floor or roof of a steel structure.

[0018] The composite slab 100 includes a deck plate 200, spacers 300, reinforcing bars 400 as a reinforcing material, a welded wire mesh 500, and a concrete portion 600. The deck plate 200 is spanned between, for example, beams made of H-shaped steel that are arranged opposite to each other in the structure.

[0019] [Deck Plate] FIG. 2 is a front view for explaining the configuration of the deck plate 200. The deck plate 200 is a corrugated steel plate formed by roll-forming a thin steel plate subjected to surface treatment such as zinc plating. The deck plate 200 has a peak portion 210, a valley portion 220, and an inclined portion 230. Note that the deck plate 200 may not be subjected to surface treatment such as zinc plating.

[0020] Hereinafter, the direction in which the deck plate 200 is spanned between the beams is defined as the longitudinal direction (length direction) L of the deck plate 200, and the direction in which the deck plate 200 extends intersecting the longitudinal direction L is defined as the short direction (width direction) W. The deck plate 200 has a waveform in which the peak portions 210 and the valley portions 220 extending in the longitudinal direction L are continuously connected to each other in the short direction W via the inclined portions 230.

[0021] The single plate of the deck plate 200 consists of two peak portions 210, one valley portion 220, and two pairs of inclined portions 230, and is formed in a waveform in a cross section along the short direction W. The deck plate 200 may be subjected to end closure processing at both ends in the longitudinal direction L.

[0022] The peak portion 210 is a flat portion formed on the upper side with respect to the beam in a state of being spanned between the beams, and is a plate-like portion extending in the longitudinal direction L. The peak portion 210 has a groove 211. The groove 211 is formed to be recessed toward the valley portion 220 side. The groove 211 extends in the longitudinal direction L, and when there is one groove 211, it is provided near the center in the short direction W.

[0023] The groove 211 at the top portion 210 improves the strength of the top portion 210. The groove 211 is not limited to being formed singly at the top portion 210, and a plurality of grooves 211 may be formed. Note that the groove 211 may not be formed.

[0024] The bottom portion 220 of the valley is parallel or substantially parallel to the top portion 210, and is a flat portion formed to be placed on the beam with respect to the top portion 210 in a state of being spanned between the beams. The bottom portion 220 of the valley is a plate-like portion extending in the longitudinal direction L. The bottom portion 220 of the valley does not overlap the top portion 210 in the short direction W. Note that the groove 211 formed in the top portion 210 may be formed in the bottom portion 220 of the valley.

[0025] The inclined portion 230 is a portion connecting the top portion 210 and the bottom portion 220 of the valley, and is a plate-like portion extending in the longitudinal direction L. The inclined portion 230 extends obliquely from both ends of the top portion 210 toward the bottom portion 220 of the valley in the short direction W. The inclined portion 230 is inclined so as to form a predetermined angle, for example, an obtuse angle, with respect to the top portion 210 and the bottom portion 220 of the valley. Note that the groove 211 formed in the top portion 210 may be formed in the inclined portion 230.

[0026] A bulging portion 241 is formed at the transition portion 240 between the bottom portion 220 of the valley and the inclined portion 230. The bulging portion 241 is a portion protruding on opposite sides in a pair of inclined portions 230. That is, in a pair of opposed inclined portions 230, the bulging portions 241 are formed to face each other and bulge in a direction approaching each other.

[0027] An engaging groove (dovetail groove) 242 with which the spacer 300 engages is formed between the bulging portion 241 and the bottom portion 220 of the valley. The cross section of the engaging groove 242 along the short direction W is formed to be curved along the short direction W. That is, in a pair of opposed inclined portions 230 on one surface of the deck plate 200, the engaging grooves 242 are formed to face each other and are curved in a direction away from each other.

[0028] [Spacer] In the spacer 300, a pair of engaging portions 330, which will be described later, respectively enter and engage with the opposing engaging grooves 242, so that the position with respect to the deck plate 200 is fixed, and the bulging portion 241 restricts the spacer 300 from disengaging from the engaging groove 242. In this fixed state, the spacer 300 can maintain the distance from the reinforcing bar 400 disposed on the deck plate 200 by supporting the reinforcing bar 400 from below.

[0029] FIG. 3 is a perspective view for explaining the configuration of the spacer 300. A plurality of spacers 300 are provided at predetermined intervals in the longitudinal direction L at the valley bottom portion 220 on one surface (upper surface) of the deck plate 200. In the state where the spacer 300 is installed at the valley bottom portion 220, the spacer 300 supports the reinforcing bar 400 arranged along the longitudinal direction L of the deck plate 200 at a position separated from the valley bottom portion 220 by a predetermined height beyond the peak portion 210. The spacer 300 supports the reinforcing bar 400 from the side of the valley bottom portion 220 along the longitudinal direction L.

[0030] The spacer 300 is formed of, for example, a steel plate. The spacer 300 mainly includes a support portion 310, a pair of leg portions 320, and a pair of engaging portions 330. The spacer 300 is a member in which the support portion 310, the pair of leg portions 320, and the pair of engaging portions 330 are continuously and integrally formed. Note that the direction in which the support portion 310 supports the reinforcing bar 400 coincides with the longitudinal direction L of the deck plate 200.

[0031] The support portion 310 is a portion that supports the reinforcing bar 400 and is formed in a rectangular or substantially rectangular shape in plan view, for example. The support portion 310 is located at the uppermost position when the spacer 300 is installed on the deck plate 200. The support portion 310 has, for example, one recess 311. The recess 311 is formed to be recessed in an arc shape toward the valley bottom portion 220 of the deck plate 200 when the spacer 300 is installed on the deck plate 200, and extends along the longitudinal direction L of the deck plate 200. The recess 311 receives the reinforcing bar 400 along its extending direction (longitudinal direction L).

[0032] The pair of legs 320 extend from a pair of opposite edges of the support portion 310 at a predetermined angle with respect to the main surface of the support portion 310 and extend to the same side of each other. The pair of legs 320 extend at an obtuse angle with respect to the support portion 310. The pair of legs 320 are provided such that one end portion in the respective extending directions is continuous with the support portion 310 and extend from the support portion 310 so as to be separated from each other.

[0033] Since the pair of legs 320 are continuously formed by a single steel plate, they are elastically deformable so as to approach and separate from each other. In each leg 320, an engaging portion 330 is provided at the other end portion (the other end portion in the extending direction) on the side opposite to the support portion 310.

[0034] The pair of engaging portions 330 each extend in a direction away from each other from the other end portion of each leg 320. The pair of engaging portions 330 extend parallel or substantially parallel to the support portion 310 along the short side direction W in a state where the spacer 300 is installed on the deck plate 200. The pair of engaging portions 330 are provided such that one end portion of each is continuous with the leg 320.

[0035] The pair of engaging portions 330 are engaged with the respective opposing engaging grooves 242 of the deck plate 200, thereby restricting detachment from the deck plate 200. Thereby, the spacer 300 is in a state of being installed on the deck plate 200. The pair of engaging portions 330 are in contact with the valley bottom portion 220 in a state where the spacer 300 is installed on the deck plate 200.

[0036] The other end portions of the pair of engaging portions 330 each have a first edge 331 extending along the extending direction (longitudinal direction L) of the engaging groove 242 and a second edge 332 extending in a direction away from the engaging groove 242 and continuous with the first edge 331 in a state of being engaged with the engaging groove 242.

[0037] Of the pair of engaging portions 330, in the engaging portion 330, when viewed in plan, the first edge portion 331 is linearly formed from one end portion along the longitudinal direction L in the engaging portion 330 toward the other end portion, and reaches the second edge portion 332 before reaching the other end portion, and the corner portion of the other end portion is chamfered. That is, the second edge portion 332 is formed in an arc shape so as to curve.

[0038] In each engaging portion 330, the first edge portion 331 and the second edge portion 332 are formed at positions facing each other diagonally. This is to prevent the engaging portion 330 from getting caught in the engaging groove 242 and to smoothly rotate and lock the engaging portion 330 in the engaging groove 242 by forming the tip side in the rotation direction in the engaging portion 330 to curve when the spacer 300 is rotated 90° and the engaging portion 330 is locked in the engaging groove 242.

[0039] [Reinforcing bars, welded wire mesh] The reinforcing bars 400 are supported by a plurality of spacers 300 provided along the longitudinal direction L of the deck plate 200 and are arranged so as to extend in the longitudinal direction L of the deck plate 200. Specifically, the reinforcing bars 400 are placed in the concave portions 311 of the support portions 310 of the spacers 300 engaged with the engaging grooves 242 of the deck plate 200, and are arranged so that the reinforcing bars 400 do not roll off from the support portions 310.

[0040] The reinforcing bars 400 are, for example, deformed reinforcing bars obtained by rolling steel and providing projections with irregularities called ribs and joints on the surface. However, it is not limited to this, and as long as it functions as a reinforcing material for the composite slab 100, for example, various other shapes and types of reinforcing bars such as round steel and square steel, and bars made of other materials may be used.

[0041] The welded wire mesh 500 is formed in a lattice shape by, for example, steel wire rods and is placed on the spacers 300 and the reinforcing bars 400.

[0042] [Concrete part] The concrete part 600 is formed by placing concrete on one surface (upper surface) of the deck plate 200 and allowing it to solidify. The concrete part 600 is placed so as to cover the spacers 300, the reinforcing bars 400, and the welded wire mesh 500, and after the solidification of the concrete part 600, it is in a state of being embedded in the concrete part 600.

[0043] <Construction jig> In order to install the spacer 300 on the deck plate 200, an operator rotates the temporarily placed spacer 300, for example, 90° clockwise so that the engaging portion 330 of the spacer 300 enters the engaging groove 242 of the deck plate 200. This operation is performed in a bent posture, and the work load of the operator for installing a plurality of spacers 300 temporarily placed on the deck plate 200 is large.

[0044] Also, in order to facilitate the entry of the engaging portion 330 of the spacer 300 into the engaging groove 242 of the deck plate 200, it is necessary to bring the pair of leg portions 320 closer and rotate them. However, since the spacer 300 is formed of a steel plate, a great deal of labor is required for an operator to manually bring the pair of leg portions 320 of the spacer 300 closer.

[0045] Therefore, the construction jig 1 according to the present embodiment is used. The construction jig 1 is a jig for engaging with the spacer 300, rotating the spacer 300, inserting the engaging portion 330 into the engaging groove 242 of the deck plate 200, and locking the spacer 300 to the deck plate 200.

[0046] The construction jig 1 according to this embodiment is a construction jig 1 that installs a metal spacer 300 that supports a reinforcing bar 400 arranged in the longitudinal direction L at the valley bottom 220 in a deck plate 200 in which a plurality of ridge tops 210 and valley bottoms 220 that are continuous with each other via inclined portions 230 form a wave shape, by rotating the spacer 300. The construction jig 1 includes a cylindrical member (engagement member) 10 that engages non-rotatably with a pair of leg portions 320 of the spacer 300 that engage with the respective inclined portions 230 facing each other, and an operation member 30 that is formed integrally with the cylindrical member 10 and rotates the cylindrical member 10 in a state of being engaged with the spacer 300 to lock the pair of leg portions 320 of the spacer 300 to the inclined portions 230. The construction jig 1 according to this embodiment will be specifically described below.

[0047] FIG. 4A is a side view showing the construction jig 1 according to this embodiment. FIG. 4B is a cross-sectional view taken along line B-B in FIG. 4A, and the spacer 300 is shown by a broken line. The construction jig 1 has a cylindrical member (engagement member) 10 and an operation member 30. Both the cylindrical member 10 and the operation member 30 are members made of, for example, metal, and are integrally formed with each other by, for example, welding. The cylindrical member 10 is formed in a rectangular or substantially rectangular cross-sectional shape. One end of the cylindrical member 10 is open, and the other end is closed by the operation member 30.

[0048] The cylindrical member 10 has four wall portions 11, 12, 13, 14. The wall portions 11 to 14 are adjacent to each other in the circumferential direction. Among the wall portions 11 to 14, the wall portions 11, 13 and the wall portions 12, 14 face each other. The intervals 10D between the inner peripheral surfaces of the wall portions 11, 13 and the wall portions 12, 14 are the same as each other.

[0049] Referring to FIG. 3, the distance 10D between the cylindrical members 10 is smaller than the distance 320D between the ends of the pair of legs 320 on the side of the engaging portion 330 of the spacer 300 (10D < 320D). Also, the distance 10D between the cylindrical members 10 is greater than the width 300W of the spacer 300 and the pair of legs 320 (10D > 300W), and greater than the length 310L of the support portion 310 of the spacer 300 (10D > 310L). The cylindrical member 10 has a length 10L along the axis x passing through its center, which is greater than the height 300H of the spacer 300 (10L > 300H).

[0050] The operating member 30 has a closing portion 31, a rod-shaped extending portion 32, and a gripping portion 33. The closing portion 31 is formed of, for example, a plate-shaped member made of metal that closes one end of the cylindrical member 10 in the direction of the axis x.

[0051] The extending portion 32 is formed of, for example, a rod-shaped member made of metal. One end of the extending portion 32 is connected to the closing portion 31, for example, by welding. The extending length of the extending portion 32 may be set as appropriate. For example, in a state where an operator using the construction jig 1 stands up, the installation work of the spacer 300 can be performed.

[0052] The gripping portion 33 is formed of, for example, a rod-shaped member made of metal. The extending direction of the gripping portion 33 is orthogonal to the extending direction of the extending portion 32. The extending portion 32 and the gripping portion 33 are connected to each other and formed in a T shape. At approximately the center of the gripping portion 33 in the length direction, the other end of the extending portion 32 is connected, for example, by welding. The gripping portion 33 is the part that an operator grasps when rotating the spacer 300.

[0053] <Installation method of the spacer> Next, an installation method for installing the spacer 300 on the deck plate 200 using the construction jig 1 according to the present embodiment will be described. The installation method for installing the spacer 300 on the deck plate 200 by the construction jig 1 according to the present embodiment is a method of rotating and installing the spacer 300 that supports the reinforcing bar 400 arranged in the longitudinal direction L at the valley bottom portion 220 in the deck plate 200 in which a plurality of peak portions 210 and valley bottom portions 220 that are continuous with each other via the inclined portion 230 form a wave shape. The installation method includes a temporary placement step of temporarily placing the spacer 300 at the valley bottom portion 220, an engagement step of engaging the construction jig 1 with the spacer 300 installed at the valley bottom portion 220, and a rotation step of rotating the construction jig 1 in a state of being engaged with the spacer 300. By rotating the construction jig 1 in the rotation step, a pair of leg portions 320 of the spacer 300 are locked to the respective opposing inclined portions 230. Hereinafter, the installation method of the spacer 300 on the deck plate 200 will be specifically described.

[0054] FIG. 5A is a view showing a state where the spacer 300 is temporarily placed on the deck plate 200. The spacer 300 is temporarily placed by an operator at the valley bottom portion 220 of the deck plate 200 such that a pair of leg portions 320 face the longitudinal direction L respectively. A plurality of spacers 300 are arranged at predetermined intervals along the longitudinal direction L at the valley bottom portion 220 of the deck plate 200.

[0055] FIG. 5B is a cross-sectional view showing the step of engaging the construction jig 1 with the spacer 300. The operator holds the gripping portion 33, approaches the construction jig 1 to the spacer 300 from the side of the opening 15 of the cylindrical member 10, and pushes the construction jig 1 into the spacer 300 from the side of the support portion 310 to insert the spacer 300 into the inside of the cylindrical member 10.

[0056] Since the interval 10D between the wall portions 11 to 14 of the construction jig 1 is larger than the length 310L of the support portion 310 of the spacer 300, the spacer 300 starts to be accommodated in the cylindrical member 10 of the construction jig 1 without resistance. As the construction jig 1 is pushed in, the wall portions 11, 13 or the wall portions 12, 14 facing the pair of leg portions 320 come into contact with the leg portions 320 respectively. In the present embodiment, it is pushed in until the edge on the opening 15 side of the cylindrical member 10 comes into contact with the engaging portion 330.

[0057] In a state where the spacer 300 is completely accommodated in the cylindrical member 10, the pair of wall portions 11, 13 or the wall portions 12, 14 of the cylindrical member 10 are in contact (engagement) with the pair of leg portions 320 of the spacer 300 respectively. Since the interval 10D between the wall portions 11, 13 or the wall portions 12, 14 is smaller than the interval 320D between the pair of leg portions 320, in the process of pushing the spacer 300 into the construction jig 1, the pair of leg portions 320 are moved in a direction approaching each other.

[0058] Next, the operator rotates the construction jig 1 about the extending portion 32. FIG. 5C is a diagram showing the process of rotating the construction jig 1. The direction of rotating the construction jig 1 is the direction in which the second edge portion 332 precedes in the rotation direction. The operator rotates the construction jig 1 to slide the engaging portion 330 of the spacer 300 into the engaging groove 242 of the deck plate 200.

[0059] In this state, the movement of the engaging portion 330 of the spacer 300 in the height direction is restricted by the bulging portion 241 of the deck plate 200, and the spacer 300 is locked by the pair of leg portions of the spacer 300 to the respective opposing inclined portions 230.

[0060] Next, the operator pulls up the construction jig 1. FIG. 5D is a diagram showing the process of removing the construction jig 1 from the spacer 300. Since the engaging portion 330 of the spacer 300 has entered the engaging groove 242 of the deck plate 200, the spacer 300 is caught by the bulging portion 241 of the deck plate 200, and the construction jig 1 is detached from the spacer 300.

[0061] According to the construction jig 1 as described above, instead of direct manual work by an operator, by simply engaging and rotating the engaging member 10 of the construction jig 1 with the spacer 300, the engaging portion 330 of the spacer 300 can be inserted into the engaging groove 242 of the deck plate 200. Therefore, the work efficiency is improved and the work burden is significantly reduced.

[0062] Furthermore, since the construction jig 1 accommodates the spacer 300 with the cylindrical member 10, relative rotation with respect to the spacer 300 is suppressed by engaging with the spacer 300 when the construction jig 1 rotates. Further, since the cross-sectional shape of the cylindrical member 10 is formed in a rectangular shape, even if, for example, the wall portions 11, 13 that were engaged with the leg portion 320 move relative to the leg portion 320 when the construction jig 1 rotates, the leg portion 320 will surely engage with the wall portions 12, 14, and the spacer 300 can be reliably rotated by the construction jig 1. Further, the directionality of accommodating the spacer 300 by the cylindrical member 10 is not limited.

[0063] Furthermore, since the construction jig 1 includes the operation member 30 having the extending portion 32 extending in the height direction from the cylindrical member 10, the construction jig 1 can be handled in a state where the operator stands up without bending. Also, the operability of the operator is improved by the gripping portion 33 of the operation member 30.

[0064] <Modification Example 1> Next, the construction jig 1A according to Modification Example 1 will be described. FIG. 6 is a longitudinal sectional view of the construction jig 1A according to Modification Example 1. In the following, the same components as those of the construction jig 1 may be denoted by the same reference numerals and the description may be omitted.

[0065] The cylindrical member 10 of the construction jig 1A according to Modification Example 1 is configured to accommodate a plurality of spacers 300. When a plurality of spacers 300 are accommodated in the cylindrical member 10, the spacer 300 on the side of the opening 15 among the plurality of spacers 300 is pushed out from the opening 15 so that the engaging portion 330 is exposed to the outside.

[0066] For example, between the closing part 31 of the construction jig 1 and the uppermost spacer 300, a biasing mechanism is provided that pulls the spacer 300 toward the closing part 31 while holding the spacer 300. The extrusion of the spacer 300 within the cylindrical member 10 may be appropriately designed such that, for example, the spacer 300 within the cylindrical member 10 is extruded by an operator from the side of the closing part 31 against the biasing force of the biasing mechanism.

[0067] When the spacer 300 on the opening 15 side is locked to the deck plate 200, the continuous installation operation of the spacer 300 can be carried out by then extruding the spacer 300 located on the side of the opening 15.

[0068] With the construction jig 1A according to Modification 1, the continuous installation operation of the spacer 300 onto the deck plate 200 becomes possible.

[0069] <Modification 2> Next, the construction jig 1B according to Modification 2 will be described. FIG. 7 is a perspective view of the construction jig 1B according to Modification 2. In the following, the same components as those of the construction jig 1 may be denoted by the same reference numerals and the description thereof may be omitted.

[0070] The construction jig 1B according to Modification 2 includes a cylindrical member 10 and an operating member 30B. The operating member 30B is formed in a rod shape, and the axis z passing through the center extends along the surface of the closing part 31. That is, the axis x of the cylindrical member 10 and the axis z of the operating member 30B intersect with each other, for example, are orthogonal to each other.

[0071] According to the construction jig 1B according to Modification 2, the operating member 30B does not extend in the height direction and has, for example, a length dimension such that the construction jig 1B can be rotated between the inclined portions 230, and can be configured to be more compact as a whole compared to the construction jigs 1 and 1A.

[0072] <Modification 3> Next, the construction jig 1C according to Modification 3 will be described. FIG. 8A is a diagram for explaining the configuration of the construction jig 1C according to Modification 3. In the following, the same components as those of the construction jig 1 may be denoted by the same reference numerals and the description thereof may be omitted.

[0073] The construction jig 1C according to Modification 3 is a construction jig 1C that is installed on a deck plate 200 in which a plurality of peak portions 210 and valley bottom portions 220 that are continuous with each other via inclined portions 230 form a wave shape and are arranged in the longitudinal direction L, and supports a reinforcing bar 400 at the valley bottom portion 220 by rotating a spacer 300. The construction jig 1C includes an engaging portion 10C that engages non-rotatably with a pair of leg portions 320 of the spacer 300 that engage with respective opposing inclined portions 230, and a clamping portion 20C that is formed integrally with the engaging portion 10C and clamps one of the pair of leg portions 320 in its width direction between the engaging portion 10C. The construction jig 1C is characterized in that the engaging portion 10C in a state of being engaged with the spacer 300 is rotated to lock the pair of leg portions 320 to the inclined portion 230. Hereinafter, the construction jig 1C according to Modification 3 will be specifically described.

[0074] The construction jig 1C according to Modification 3 includes an engaging portion (engaging member) 10C and a clamping portion 20C. The engaging portion 10C is a rod-shaped portion that extends linearly. One end of the engaging portion 10C is gripped by an operator.

[0075] The clamping portion 20C has an extending portion 21C and a clamping portion 22C that are integrally formed with each other. The extending portion 21C extends orthogonally to the extending direction of the engaging portion 10C from the engaging portion 10C. The extending portion 21C is provided at one end portion rather than the middle of the engaging portion 10C.

[0076] The clamping portion 22C is provided at the end portion of the extending portion 21C on the side opposite to the engaging portion 10C. The clamping portion 22C extends orthogonally to the extending direction of the clamping portion 22C so as to extend parallel or substantially parallel to the engaging portion 10C.

[0077] The distance 20Cd between the engaging portion 10C and the clamping portion 22C is the same as or substantially the same as the distance 320D between the legs 320 of the spacer 300.

[0078] Next, a method for installing the spacer 300 using the construction jig 1C according to Modification 3 will be described. FIG. 8B is a diagram showing a state in which the construction jig 1C according to Modification 3 is engaged with the spacer 300. The operator inserts the engaging portion 10C between the pair of legs 320. The engaging portion 10C is inserted so that the clamping portion 22C cooperates with the engaging portion 10C to clamp one of the legs 320 along its width 300W.

[0079] The engaging portion 10C is in contact with each of the pair of legs 320, but the edge of the leg 320 in contact on the side of the clamping portion 22C and the edge of the leg 320 in contact on the tip side are in an oblique positional relationship.

[0080] The operator rotates the construction jig 1C toward the clamping portion 22C, causing the spacer 300 to rotate as well, and the engaging portions 330 of the legs 320 enter the engaging grooves 242 of the deck plate 200 respectively.

[0081] <Others> As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments and Modifications 1 to 3, and includes all aspects included in the concept and scope of claims of the present invention. Also, each configuration may be selectively combined as appropriate so as to achieve at least part of the above-described problems and effects. For example, the construction jigs 1, 1A, and 1B according to the above-described embodiments and Modifications 1 and 2 were in contact with the engaging portion 330 of the spacer 300 and engaged with the legs 320, but the position where the cylindrical member 10 contacts the legs 320 is not particularly limited.

[0082] Also, the cylindrical member 10 of the construction jigs 1, 1A, and 1B according to the above-described embodiments was formed in a cylindrical shape. However, for example, only a pair of wall portions 11, 13 or wall portions 12, 14 may be provided. In this case, the edge portions of the wall portions 11, 13 or the wall portions 12, 14 may be formed so as to engage with the edges of the pair of legs 320.

[0083] Also, in the above-described embodiments and Modifications 1 to 3, the rotation direction of the spacer 300 by the construction jigs 1, 1A, 1B, and 1C was the direction in which the second edge portion 332 preceded, but the rotation direction of the spacer 300 may be the direction in which the first edge portion 331 precedes.

[0084] Note that the spacer targeted by the construction jigs 1, 1A, 1B, and 1C according to the present embodiment and Modifications 1 to 3 is not particularly limited to the spacer 300.

Explanation of Reference Numerals

[0085] 1, 1A, 1B, 1C... Construction jigs 10... Cylindrical member (engaging member) 10C... Engaging portion (engaging member) 30, 30B... Operating members 100... Composite slab 200... Deck plate, 210... Crest portion, 211... Groove, 220... Valley bottom portion, 230... Inclined portion, 240... Transition portion, 241... Bulging portion, 242... Engaging groove (dovetail groove)

Claims

1. A construction jig for installing, on a deck plate having a plurality of crest portions and trough portions that are continuous with each other via inclined portions and form a wave shape, reinforcing bars arranged in the longitudinal direction by rotating a spacer that supports the reinforcing bars at the trough portions, the construction jig comprising: an engaging member that engages non-rotatably with a pair of leg portions of the spacer that engage with respective opposed inclined portions; an operating member that is formed integrally with the engaging member and rotates the engaging member in a state where the engaging member is engaged with the spacer to lock the pair of leg portions to the inclined portions; The construction jig is characterized by comprising the above.

2. The engaging member is a cylindrical member having a rectangular cross section with one end open and the other end closed by the operating member, and is formed so as to be capable of accommodating at least part of the spacer. The construction jig according to claim 1.

3. The engaging member is formed so as to be capable of accommodating a plurality of spacers. The construction jig according to claim 2.

4. The operating member has an extending portion that extends from the engaging member in a direction opposite to the spacer, and a gripping portion that extends intersecting the extending portion at an end on the side opposite to the engaging member. The construction jig according to claim 2 or 3.

5. The operating member has a gripping portion that extends in a direction intersecting the direction in which the engaging member engages with the spacer. The construction jig according to claim 2 or 3.

6. A construction jig for installing, on a deck plate having a plurality of crest portions and trough portions that are continuous with each other via inclined portions and form a wave shape, reinforcing bars arranged in the longitudinal direction by rotating a spacer that supports the reinforcing bars at the trough portions, the construction jig comprising: an engaging portion that engages non-rotatably with a pair of leg portions of the spacer that engage with respective opposed inclined portions; a clamping portion that is formed integrally with the engaging portion and clamps one of the pair of leg portions in its width direction between the engaging portion; Comprising Rotating the engaging portion in a state where the engaging portion is engaged with the spacer to lock the pair of leg portions to the inclined portions The construction jig is characterized by comprising the above.

7. An installation method for installing, on a deck plate having a plurality of crest portions and trough portions that are continuous with each other via inclined portions and form a wave shape, reinforcing bars arranged in the longitudinal direction by rotating a spacer that supports the reinforcing bars at the trough portions, the installation method comprising: A temporary placement step of temporarily placing the spacer at the bottom of the trough; An engagement step of engaging the construction jig according to any one of claims 1 to 6 with the spacer installed at the bottom of the trough; A rotation step of rotating the construction jig in a state of being engaged with the spacer; comprising; By rotating the construction jig in the rotation step, a pair of legs of the spacer are locked to the respective inclined portions facing each other; A method for installing a spacer, characterized in that.

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