JP2023179073A - Main reinforcement support metal fitting - Google Patents

Abstract

To provide a main reinforcement support metal fitting which enables a main reinforcement for reinforcement to be easily laid with respect to a deck plate with a truss.SOLUTION: A main reinforcement support metal fitting 10 is configured such that a reinforcement truss 5 including a linearly extending upper main reinforcement 6 and a lattice material for joining a peak 23 to the upper main reinforcement 6, the peak 23 and a valley 25 being repeatedly wavy along a longitudinal direction of the upper main reinforcement 6 supports a reinforcement main reinforcement 3 added for reinforcement with respect to a deck plate 2 with a truss integrally fixed to an upper surface of a metal plate member 21. The main reinforcement support metal fitting 10 has: a main body 14 composed of a linear member 12 hung intersecting the upper main reinforcements 6 of the plurality of reinforcement trusses 5 provided side by side; and a plurality of recessed parts 16 provided at fixed intervals in the longitudinal direction of the main body 14 so as to be positioned in rough centers between the adjacent upper main reinforcements 6 and the upper main reinforcements 6. Each of the recessed parts 16 has a part of the linear member 12 recessed toward the upper surface of the plate member 21, and thus has a size at least equal to a diameter of the reinforcement main reinforcement 3.SELECTED DRAWING: Figure 3

Description

The present invention relates to a main reinforcement support fitting.

BACKGROUND ART Conventionally, a deck plate with a truss has been known as a structural member used for constructing a concrete slab or the like, in which a reinforcing bar truss having a main reinforcement and a lattice material is joined to a plate-like member and integrated. For example, Patent Document 1 discloses a deck plate with a truss on which a reinforcing bar truss is disposed. In the reinforcing bar truss in this trussed deck plate, one upper main reinforcing bar and two lower main reinforcing bars are each joined to two lattice members bent in a waveform.

Incidentally, the amount of reinforcing bars used in a concrete slab or the like varies depending on the structure of the slab or the like and the required strength, and depending on this, narrower spacing between the main bars may be required. One way to deal with this case is to add reinforcing main reinforcement between the upper main reinforcing bars and narrow the spacing between the main reinforcing bars while maintaining the spacing between the reinforcing bar trusses. In order to support the reinforcing main reinforcing bars, supporting members such as reinforcing bars are disposed on the trussed deck plate so as to intersect with the plurality of parallel upper main reinforcing bars.

However, when the supporting member is spanned over the upper main reinforcement and the reinforcing main reinforcement is disposed on the supporting member, it becomes difficult to ensure the concrete cover thickness for the reinforcing steel. Therefore, as shown in FIG. 4, for example, a construction method is used in which a support member 47 is passed under the upper main reinforcement 41 on the trussed deck plate 40. The reinforcing main reinforcement 43 is arranged above the support member 47 so as to be located between the upper main reinforcement 41 and the upper main reinforcement 41 . In this way, the spacing between the main reinforcing bars is narrowed while ensuring the cover thickness and maintaining the spacing between the reinforcing bar trusses 45.

Japanese Patent Application Publication No. 2004-339709

However, when passing the support member under the upper main reinforcement, it is necessary to fix the support member to the upper main reinforcement with a wire or the like. Furthermore, if there are few locations fixed to the upper main reinforcement, it is possible that the support member may be deflected. Furthermore, it is conceivable that the position and direction of the reinforcing main reinforcing bars disposed on the upper side of the support member may be shifted. Therefore, when arranging the reinforcing main reinforcing bars, it tends to take time and effort to determine their positions and to fix the supporting members and the main reinforcing bars with wires or the like.

The present invention has been devised in view of these points, and the problem to be solved by the present invention is to provide a main reinforcement support that can easily provide main reinforcement for reinforcing a deck plate with a truss. Our goal is to provide metal fittings.

One feature of the main reinforcement support fitting for solving the above problem is that the upper main reinforcement extends linearly, and the upper main reinforcement has a wavy shape in which peaks and troughs are repeated along the length direction. a lattice material that connects to the upper main reinforcement, and a reinforcing reinforcement truss that supports a reinforcing main reinforcement added for reinforcement to a deck plate with a truss that is integrally fixed to the upper surface of the metal plate member. A main reinforcing bar support fitting comprising: a main body made of a linear member that crosses over the upper main reinforcing bars of a plurality of reinforcing bar truss, and approximately the center between the adjacent upper main reinforcing bars and the upper main reinforcing bars; A plurality of linear members are provided at regular intervals in the length direction of the main body so as to be located at and a concave portion having a size.

One feature and advantage of the above configuration is that the main reinforcing bar support metal part intersects with the upper main reinforcing bars of the reinforcing bar truss, and is spanned over a plurality of parallel upper main reinforcing bars. The main body portion is provided with a plurality of concave portions at regular intervals so as to be located approximately in the center between the upper main reinforcements. The concave portion is recessed toward the upper surface of the plate member, and is set to have a size corresponding to at least the diameter of the main reinforcing bar. Therefore, by arranging the reinforcing main reinforcing bars in the concave portion, the position and direction of the reinforcing main reinforcing bars can be easily determined. In addition, the overall spacing between the main reinforcements can be narrowed, and the reinforcing main reinforcements do not protrude above the main body of the main reinforcement support fitting, so that the concrete cover thickness over the reinforcing bars can be ensured. With these configurations, it is possible to save the effort of fixing the main reinforcing bars to the upper main reinforcing bars, and to further simplify the work of arranging the reinforcing main bars between the upper main reinforcing bars on the trussed deck plate.

The main reinforcement support may be provided only at one end in the length direction of the main body, and the linear member may have a bent portion bent in the same direction as the concave portion.

One feature and advantage of the above configuration is that a bent portion is provided at one end of the main reinforcing support metal fitting. The bending portion engages with the upper main reinforcement and is locked to the upper main reinforcement in the longitudinal direction of the main body portion, so that displacement of the position of the recessed portion, that is, the position of the reinforcing main reinforcement can be suppressed.

In the main reinforcement support fitting, the bending portion may be positioned such that, when engaged with the upper main reinforcement, each of the concave portions is a distance that bisects the distance between adjacent upper main reinforcements.

One feature and advantage of the above configuration is that when the flexure engages the upper main reinforcement, each of the recesses is positioned to bisect the spacing between adjacent upper main reinforcements. A section is formed. That is, by locking the bent portion to the upper main reinforcing bars in the longitudinal direction of the main body part, the reinforcing main reinforcing bars can be positioned and disposed so as to bisect the interval between adjacent upper main reinforcing bars. This makes it easy to arrange the upper main reinforcement and reinforcing main reinforcement at equal intervals.

By having the configurations of the above-mentioned inventions, the present invention can provide a main reinforcement support metal fitting that can easily arrange main reinforcing bars on a trussed deck plate.

It is a perspective view of a deck plate with a truss concerning this embodiment, and is a figure showing a state where main reinforcement support metal fittings and main reinforcement for reinforcement are arranged. It is a front view of the main reinforcement support metal fitting concerning this embodiment. FIG. 2 is a view taken in the direction of arrow III in FIG. 1; It is a figure which shows the deck plate with a truss to which the main reinforcement for reinforcement was added by the prior art.

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the main reinforcing bar support fitting 10 according to the present invention is provided with a predetermined interval between the upper main reinforcing bars 6 of adjacent reinforcing bar trusses 5 in a trussed deck plate 2 used for construction work such as concrete slabs, for example. bridged. And, it is a main reinforcement support metal fitting for a deck plate with a truss that supports main reinforcements (main reinforcement reinforcement 3) added for reinforcement at at least two places.

The trussed deck plate 2 has a structure in which a reinforcing bar truss 5 is integrally fixed to the upper surface of a metal plate member 21. The reinforcing bar truss 5 includes one upper main reinforcing bar 6 extending linearly, two lower main reinforcing bars 7, and a wavy pair of peaks 23 and valleys 25 repeating along the length direction of the upper main reinforcing bar 6. lattice materials 8a and 8b are provided.

The upper main reinforcing bars 6 and the lower main reinforcing bars 7 are formed by stretching iron material linearly in the axial direction. For example, deformed reinforcing bars may be used. Furthermore, reinforcing bars with different diameters are used for the upper main reinforcing bars 6 and the lower main reinforcing bars 7, respectively. Note that the diameter of the upper main reinforcement 6 is larger than the diameter of the lower main reinforcement 7. Regarding the reinforcing bars used for these main reinforcing bars, reinforcing bars with the same diameter may be used for the upper main reinforcing bars 6 and the lower main reinforcing bars 7, or reinforcing bars with different diameters may be used respectively. Further, the height positions of the upper main reinforcing bars 6 and the lower main reinforcing bars 7 can be set as appropriate depending on the size of the reinforcing bar truss 5.

The lattice materials 8a and 8b are formed by bending a linear metal material, such as an iron wire material, so that it becomes wavy in the length direction. The lattice materials 8a and 8b are a pair of one lattice material 8a and the other lattice material 8b. These lattice members 8a and 8b are arranged to face each other so as to sandwich the upper main reinforcement 6 from both sides in the width direction intersecting the direction in which the upper main reinforcement 6 extends. Referring to FIG. 3, the lattice materials 8a and 8b are arranged such that the valley portions 25 facing each other across the upper main reinforcement 6 are spaced apart from each other, and the lattice materials 8a and 8b each extend in the width direction, It has an expanded configuration. That is, the pair of lattice members 8a and 8b are arranged in a triangular shape when viewed from the length direction. Further, the lower main reinforcing bars 7 are arranged so as to be in contact with the side surfaces of the pair of lattice members 8a and 8b, respectively. The upper main reinforcing bars 6 and the two lower main reinforcing bars 7 are spaced apart from each other, and the lower main reinforcing bars 7 are located diagonally downward along the upper main reinforcing bars 6.

The lattice materials 8a and 8b each include a bent leg portion 27 at each valley portion 25. Specifically, the lattice materials 8a and 8b are bent outward in the width direction so that the troughs 25 of one lattice material 8a and the troughs 25 of the other lattice material 8b move away from each other, and the legs 27 are bent outward in the width direction. It is formed.

As the plate member 21, a metal plate member such as a hot-dip galvanized steel plate is used, for example. Ribs 29 are formed on the surface of the plate member 21 in accordance with the installation position of the reinforcing bar truss 5. The rib 29 protrudes upwardly from the surface of the plate member 21 and extends linearly along the length of the plate member 21 . The leg portions 27 of the lattice materials 8a and 8b are joined to the rib 29 by welding. In this way, the reinforcing bar truss 5 and the plate member 21 are joined, and together constitute the deck plate 2 with a truss. Note that the cross-sectional shape of the rib 29 may be processed into various shapes such as a semicircle or a trapezoid. Further, the rib 29 may not be provided and a flat plate member 21 may be used. The size of the plate member 21 can be arbitrarily set depending on the width of the concrete slab. Further, the width of the plate member 21 can be set in accordance with the arrangement interval of the reinforcing bar truss 5.

The number of reinforcing bar trusses 5 installed on the plate member 21 can be set arbitrarily. For example, two reinforcing bar trusses 5 may be arranged side by side on one plate member 21 to form a set of trussed deck plates 2, or three reinforcing bar trusses 5 may be arranged side by side to form a set of trussed deck plates. Plate 2 may also be configured. A plurality of trussed deck plates 2 can be laid side by side according to the size of the floor. Furthermore, when a plurality of trussed deck plates 2 are arranged in the width direction, the edge portions of adjacent plate members 21 are configured to engage with each other. For example, the engagement may be achieved by bending the edge portion of the plate member 21 along its length.

As shown in FIGS. 2 and 3, the main reinforcement support fitting 10 includes a main body 14 made of a linear member 12, a plurality of concave portions 16 provided in the main body 14, and one end in the length direction of the main body 14. It has a bent portion 18 provided only in the portion. The linear member 12 is made of a linear metal material such as an iron wire, and is set to have a smaller diameter than the upper main reinforcing bars 6 and the lower main reinforcing bars 7. The linear member 12 may be made of the same iron member used for the lattice members 8a and 8b. Moreover, the length of the main body part 14 is set so that it crosses over the upper main reinforcements 6 of the plurality of reinforcement trusses 5 installed side by side.

A plurality of concave portions 16 are provided at regular intervals in the length direction of the main body portion 14 . The interval L1 between the concave portions 16 is set to correspond to the interval L3 between adjacent upper main reinforcements 6 in the trussed deck plate 2. That is, the main reinforcement support fitting 10 is configured such that when the main body portion 14 is spanned over the plurality of upper main reinforcements 6, the concave portions 16 are located approximately at the center between the adjacent upper main reinforcements 6. has been done. The recessed portion 16 is formed by recessing a portion of the linear member 12 toward the upper surface of the plate member 21 of the trussed deck plate 2, and is formed to have an inverted triangular shape when viewed from the front, as shown in FIG. There is.

Further, the concave portion 16 is set to have a size corresponding to at least the diameter of the main reinforcing bar 3. Specifically, the depth D1 of the recessed portion 16 and the length D2 of the recessed portion 16 in the longitudinal direction of the main body portion 14 are set to correspond to the diameter of the main reinforcing bar 3, respectively. By setting the size of the concave portion 16 to match the main reinforcing bars 3 with the maximum diameter that can be added, the main reinforcing bars 3 with different diameters (smaller than the maximum diameter) are installed, and the main reinforcing bars 10 can be It does not protrude above the main body portion 14, and a sufficient cover thickness can be ensured. For example, when the maximum diameter of the main reinforcing bars 3 to be added is 13 mm, the main reinforcing bars 3 with a diameter of 10 mm can also be provided by setting the concave portion 16 to a size corresponding to the diameter of 13 mm. Further, the size of the concave portion 16 may be set by making the maximum diameter of the reinforcing main reinforcing bars 3 the same as that of the upper main reinforcing bars 6. In this case, when the main reinforcing bars 3 having the same diameter as the upper main bars 6 are arranged in the concave portion 16, the heights of the upper main bars 6 and the main reinforcing bars 3 are aligned.

The bent portion 18 is provided only at one end in the length direction of the main body portion 14 . In the bent portion 18, the linear member 12 is bent in an L-shape in the same direction as the concave portion 16, and when the main body portion 14 is spanned over the plurality of upper main reinforcements 6, the upper main reinforcement 6 It is configured so that it can be engaged with. The distance L2 between the bent portion 18 and the recessed portion 16 closest to the bent portion 18 is set to approximately half the length L1 of the arrangement interval L1 of the recessed portions 16. That is, when the bent portion 18 engages with the upper main reinforcement 6, it can be positioned such that each of the concave portions 16 is a distance that bisects the distance between the adjacent upper main reinforcements 6. When a plurality of main reinforcing bars 10 are arranged at predetermined intervals in the length direction of the upper main reinforcing bars 6 between adjacent upper main reinforcing bars 6, the concave portions 16 are aligned in a straight line along the length direction of the upper main reinforcing bars 6. The positions of the concave portions 16 can be aligned so that they are lined up on top. That is, it is possible to position the reinforcing main reinforcing bars 3 disposed between the adjacent upper main reinforcing bars 6.

On the trussed deck plate 2, for example, when the arrangement interval L3 of the upper main reinforcements 6 of the reinforcing bar truss 5 is 200 mm, the arrangement interval L1 of the concave portions 16 in the main reinforcement support fitting 10 is set to 200 mm. The distance L2 between the bent portion 18 and the recessed portion 16 closest to the bent portion 18 is set to a length equal to 100 mm plus the diameter of the upper main reinforcement 6. Thereby, when the bent portion 18 engages with the upper main reinforcement 6, the distance between the positioned concave portion 16 and the upper main reinforcement 6 can be set to 100 mm, respectively. By arranging the reinforcing main bars 3 so as to be supported by the concave portions 16, the upper main bars 6 and the reinforcing main bars 3 are arranged alternately at intervals of 100 mm.

The arrangement interval L1 of the concave portions 16 in the main reinforcement support fitting 10 is appropriately set according to the arrangement interval L3 of the upper main reinforcements 6 of the reinforcing bar truss 5. For example, in addition to 200 mm, it may be set to 150 mm, 250 mm, etc. When the arrangement interval L1 of the concave portions 16 is 150 mm, the interval between the upper main reinforcement 6 and the reinforcing main reinforcement 3 is 75 mm. Further, when the arrangement interval L1 of the concave portions 16 is 250 mm, the interval between the upper main reinforcement 6 and the reinforcing main reinforcement 3 is 125 mm.

The reinforcing main reinforcing bars 3 are formed by stretching iron material linearly in the axial direction. For example, deformed reinforcing bars may be used. The diameter of the main reinforcing bars 3 is arbitrarily set depending on the required strength. For example, the diameter of the reinforcing main reinforcement 3 may be made the same as the diameter of the upper main reinforcement 6.

<Effect>
The main reinforcement support metal fitting 10 is spanned over a plurality of upper main reinforcements 6 so that the main body part 14 and the upper main reinforcements 6 intersect on a trussed deck plate 2 laid at a construction site. Then, the main reinforcement support fitting 10 spanning the upper main reinforcement 6 is moved along the length direction of the main body 14 so that the bent portion 18 engages with the upper main reinforcement 6. As a result, each of the concave portions 16 is positioned at a distance that bisects the distance between adjacent upper main reinforcements 6. In this way, at least two or more main reinforcing bars 10 are disposed between adjacent upper main reinforcing bars 6 at predetermined intervals in the length direction of the upper main reinforcing bars 6. Then, the reinforcing main reinforcing bars 3 are arranged so as to span the main reinforcing bars 10. The reinforcing main reinforcing bars 3 are supported by the recessed portions 16 at at least two locations. The number and spacing of the main reinforcing bars 10 are appropriately set depending on the length, diameter, weight, etc. of the reinforcing main bars 3.

By arranging the main reinforcing bars 3 in the positioned concave portions 16, the main reinforcing bars 3 are added so as to bisect the space between the upper main bars 6 and the upper main bars 6. In this way, by arranging the upper main reinforcements 6 and the reinforcing main reinforcements 3 alternately, the arrangement interval of the main reinforcements in the trussed deck plate 2 can be narrowed. The reinforcing main reinforcements 3 supported in each of the concave portions 16 are arranged at equal intervals between the upper main reinforcements 6 and the upper main reinforcements 6 without protruding above the upper surface of the main body portion 14. This ensures a sufficient cover thickness.

The main reinforcement support metal fitting 10 according to the above embodiment has the following effects. The main reinforcement support metal fitting 10 has its main body portion 14 intersecting with the upper main reinforcements 6 of the reinforcing bar truss 5, and is spanned over a plurality of parallel upper main reinforcements 6. The main body portion 14 is provided with a plurality of concave portions 16 at regular intervals so as to be located substantially in the center between the upper main reinforcements 6 . The concave portion 16 is recessed toward the upper surface of the plate member 21, and is set to have a size corresponding to at least the diameter of the main reinforcing bar 3. Therefore, by arranging the main reinforcing bars 3 in the concave portion 16, the position and direction of the main reinforcing bars 3 can be easily determined. In addition, the overall spacing between the main reinforcements can be narrowed, and the reinforcing main reinforcements 3 do not protrude above the main body part 14 of the main reinforcement support fitting 10, so that the concrete cover thickness over the reinforcing bars can be ensured. These configurations eliminate the trouble of fixing the main reinforcing bars 10 to the upper main reinforcing bars 6, and further simplify the work of arranging the reinforcing main bars 3 between the upper main reinforcing bars 6 on the trussed deck plate 2. can.

A bent portion 18 is provided at one end of the main reinforcement support fitting 10. The bending portion 18 engages with the upper main reinforcement 6 and is locked to the upper main reinforcement 6 in the length direction of the main body portion 14, thereby suppressing displacement of the position of the concave portion 16, that is, the position of the reinforcing main reinforcement 3. I can do it.

The main reinforcement support fitting 10 is configured such that when the bent portion 18 engages with the upper main reinforcement 6, each of the recessed portions 16 is positioned so as to bisect the interval L3 between adjacent upper main reinforcements 6. A bent portion 18 is formed. That is, by the bending portion 18 being locked to the upper main reinforcement 6 in the length direction of the main body portion 14, the reinforcing main reinforcement 3 is positioned and arranged so as to bisect the interval L3 between adjacent upper main reinforcements 6. Can be set. This makes it easy to arrange the upper main reinforcing bars 6 and the reinforcing main reinforcing bars 3 at equal intervals.

The recessed portion 16 in which the reinforcing main reinforcing bars 3 are disposed is recessed toward the upper surface of the plate member 21 . Thereby, the reinforcing main reinforcement 3 is locked in the concave portion 16 in the length direction of the main reinforcement support fitting 10, and displacement of the reinforcing main reinforcement 3 on the main reinforcement support fitting 10 can be suppressed. That is, the position of the reinforcing main reinforcement 3 is forcibly determined between the upper main reinforcement 6 and the upper main reinforcement 6, and it can be easily arranged in parallel with the upper main reinforcement 6.

The main reinforcement support fitting 10 may be placed on the plate member 21 of the trussed deck plate 2 in a direction parallel to the upper main reinforcement 6 at a construction site, for example, and unloaded together with the trussed deck plate 2. Thereby, after installing the trussed deck plate 2 at a construction site, it is possible to perform the work of constructing the main reinforcement support metal fittings 10 in the direction intersecting the upper main reinforcement 6 on the spot. That is, it is possible to omit the trouble of separately transporting the main reinforcing support metal fittings 10, and it is possible to improve the efficiency of the work.

By using a linear member 12 whose diameter is smaller than that of the upper main reinforcement 6 and the lower main reinforcement 7 for the main reinforcement support fitting 10, the amount of reinforcing bars used per unit area can be reduced and the weight can be reduced. . Moreover, if the main reinforcement support metal fitting 10 has a small diameter, even if it is placed above the upper main reinforcement 6, the effect on securing the cover thickness can be suppressed to a small extent.

The main reinforcement support metal fitting 10 according to the present invention is not limited to the appearance and configuration described in the above embodiments, but may be modified, added, deleted, and configured in various ways without changing the gist of the present invention. It is something that can be implemented.

For example, the length of the main body portion 14 and the number of concave portions 16 of the main reinforcement support fitting 10 can be set as appropriate depending on the aspect of the trussed deck plate 2.

The shape of the concave portion 16 can be changed as appropriate within a range that can support the main reinforcing bars 3 while ensuring the covering thickness. Further, the bent portion 18 may have another shape capable of engaging with the upper main reinforcement 6.

2 Deck plate with truss 3 Reinforcement main reinforcement 5 Reinforcement truss 6 Upper main reinforcement 7 Lower main reinforcement 8a, 8b Lattice material 10 Main reinforcement support 12 Linear member 14 Main body portion 16 Concave portion 18 Bent portion 21 Plate member 23 Peak portion 25 Valley portion 27 Leg 29 rib

Claims (3)

A reinforcing bar truss comprising an upper main reinforcement extending linearly, and a lattice material having a wavy shape in which peaks and troughs are repeated along the length direction of the upper main reinforcement, and the crests are joined to the upper main reinforcement. , a main reinforcement support metal fitting for supporting main reinforcing bars added for reinforcement of a deck plate with a truss that is integrally fixed to the upper surface of a metal plate member,
a main body portion made of a linear member that crosses and spans over the upper main reinforcement of the plurality of reinforcing bar truss;
A plurality of linear members are provided at regular intervals in the length direction of the main body so as to be located approximately at the center between the adjacent upper main reinforcements, and a part of the linear members is on the upper surface of the plate member. A main reinforcement support metal fitting having a concave portion recessed toward the direction and having a size at least corresponding to the diameter of the main reinforcing reinforcement. The main reinforcement support metal fitting according to claim 1,
The main reinforcement support metal fitting has a bent part provided only at one end in the length direction of the main body part, and in which the linear member is bent in the same direction as the recessed part. The main reinforcement support metal fitting according to claim 2,
The main reinforcement support metal fitting is configured such that, when the bent portion engages with the upper main reinforcement, each of the recessed portions is positioned at a distance that bisects the distance between the adjacent upper main reinforcements.

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