CN113638547A - Metal connecting piece, steel bar truss and manufacturing method thereof, corrugated board and manufacturing method thereof - Google Patents
Metal connecting piece, steel bar truss and manufacturing method thereof, corrugated board and manufacturing method thereof Download PDFInfo
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- CN113638547A CN113638547A CN202110342768.7A CN202110342768A CN113638547A CN 113638547 A CN113638547 A CN 113638547A CN 202110342768 A CN202110342768 A CN 202110342768A CN 113638547 A CN113638547 A CN 113638547A
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- bar truss
- steel bar
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- steel
- truss
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0636—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/08—Making wire network, i.e. wire nets with additional connecting elements or material at crossings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/08—Making wire network, i.e. wire nets with additional connecting elements or material at crossings
- B21F27/10—Making wire network, i.e. wire nets with additional connecting elements or material at crossings with soldered or welded crossings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
- B21F27/20—Making special types or portions of network by methods or means specially adapted therefor of plaster-carrying network
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/18—Spacers of metal or substantially of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/02—Material constitution of slabs, sheets or the like of ceramics, concrete or other stone-like material
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/06—Material constitution of slabs, sheets or the like of metal
Abstract
Provided are a metal connector, a steel bar truss and a manufacturing method thereof, a corrugated board and a manufacturing method thereof, which can clamp the steel bar truss and the metal connector which are arranged in parallel on the corrugated board with a main bar under the condition of not welding, improve the working efficiency of connection and maintain the strength of connection and fixation. A metal connecting member is connected to the end of a corrugated plate erected on a main beam of a building, the corrugated plate is formed by integrating a steel bar truss with a bottom plate part as a structural material of a concrete floor slab, and the steel bar truss has a linear upper main bar, 2 linear lower main bars, and a pair of wavy lattice materials. The metal connecting piece has: a support member having a first rod-shaped section extending in the plate surface direction of the bottom plate section and a second rod-shaped section extending upward with one end of the first rod-shaped section bent; and a fastening member having a first linear portion intersecting and joined to the second bar-shaped portion and an engaging portion maintaining a state of being engaged with the lower main rib at both ends of the first linear portion.
Description
Technical Field
The invention relates to a metal connecting piece, a steel bar truss with the metal connecting piece and a manufacturing method thereof, and a corrugated board and a manufacturing method thereof.
Background
Conventionally, as a structural material used for constructing a concrete floor or the like, a corrugated board with a truss in which a steel bar truss having a main bar and a lattice material is joined to a plate-shaped member to be integrated is known.
For example, patent document 1 discloses a corrugated board in which a steel bar truss is disposed. The steel bar truss in the corrugated board is formed by respectively connecting 1 upper main bar and 2 lower main bars with 2 grid materials which are bent into waves. The corrugated board is erected on a beam (hereinafter referred to as a body beam) that is a body of a building, and an end portion of the corrugated board and the body beam are fixed by a metal connector that is fixed by welding to a steel bar truss.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2007-262859
Disclosure of Invention
Problems to be solved by the invention
However, since the joints between the upper and lower main bars and the lattice material of the steel bar truss are periodic, the lattice material may be mechanically welded to the upper and lower main bars. On the other hand, the joining of the steel bar truss to the metal connecting member on the corrugated board requires adjustment of the position of the metal connecting member with respect to the main body beam and the corrugated board, and is difficult to perform welding by a machine, and therefore, the joining is generally performed by a manual work. However, welding of the steel bar truss and the metal connecting member by manual work is more likely to cause variation in the strength of welding than welding by machine. Therefore, from the viewpoint of preventing the metal connecting member from coming off during concrete pouring or the like, attention must be paid to the ability to maintain the fixing strength between the metal connecting member and the steel bar truss, and time and effort tend to be consumed in the working process. Further, since there is a case where the welding portion of the main bar to the lattice material and the welding portion to the metal joint member are concentrated, a metal joint member capable of being fixed to the steel bar truss while suppressing the number of welding portions to the main bar is desired from the viewpoint of maintaining the strength of the main bar.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a metal connector, a steel bar truss with a metal connector, a method for manufacturing the same, a corrugated board, and a method for manufacturing the same, in which the steel bar truss and the metal connector provided in parallel in the corrugated board are engaged with a main bar without welding, thereby improving the work efficiency of connection and maintaining the strength of connection and fixation.
Means for solving the problems
In order to solve the above problems, the present invention adopts the following means. First, a first aspect of the present invention is a metal connector connected to an end of a corrugated board erected on a main beam of a building, the corrugated board being formed by integrating a steel bar truss and a bottom plate portion as a structural material for a concrete floor slab, the steel bar truss including: an upper main rib extending linearly; 2 lower main beads extending in parallel in a linear shape below the upper main beads and separated from each other; and a pair of lattice materials formed in a wave shape in which mountain portions and valley portions are repeated along a longitudinal direction of the upper main bead; the metal connecting piece is provided with: a support member having a first rod-shaped portion extending in a plate surface direction of the bottom plate portion of the corrugated board, and a second rod-shaped portion formed by bending one end of the first rod-shaped portion and extending upward; and a fastening member having a first linear portion that intersects and is joined to the second rod-shaped portion of the support member, and an engaging portion that maintains a state of being engaged with the lower main bar of the steel bar truss at both ends of the first linear portion.
According to the first aspect of the invention, the metal connector is configured such that the engaging portion of the fastening member engages and abuts against the lower main rib of the steel bar truss. According to this configuration, welding is not required in the work of attaching the metal link to the lower main bead, and work efficiency can be improved. In addition, the metal connector is difficult to separate from the lower main rib through the structure of clamping the metal connector and the lower main rib, and the fixed strength of the metal connector and the main rib can be maintained. Further, the number of welding points to the lower main bead can be suppressed.
A second aspect of the invention is the metal connector according to the first aspect of the invention, which further includes a frame-like member in addition to the fastening member, the frame-like member including: a second linear portion intersecting and joined to the second rod-shaped portion of the support member, and an expanding portion extending from both ends of the second linear portion toward the plate surface of the bottom plate portion, and having lower ends expanding laterally so as to be separated from each other, and abutting against the plate surface of the bottom plate portion; the expanded portion of the frame-shaped member extends to a protruding strip portion that protrudes from the bottom plate portion of the corrugated board and is engageable with the trough portion of the lattice material of the steel truss, and the protruding strip portion is engageable with the protruding strip portion.
According to the second aspect of the invention, the metal connector is configured such that the fastening member is engaged with the lower main rib of the steel truss and the frame-shaped member abuts against the plate surface of the bottom plate portion. Thus, the frame-shaped member of the metal connector attached to the lower main rib can be configured such that the second straight portion is in contact with the lower main rib and is fixed to the plate surface of the bottom plate portion. Therefore, the metal connecting piece is clamped with the steel bar truss more stably.
A third aspect of the invention provides the metal connector according to the second aspect of the invention, wherein the fastening member is configured such that the first linear portion is in contact with a lower surface side of the lower main rib of the steel truss, and the engaging portion engages with the lower main rib in a state of being wrapped around an outer peripheral surface of the lower main rib, and in the frame-shaped member, the second linear portion supports the lower main rib from the lower surface side of the lower main rib of the steel truss.
According to the third aspect of the invention, the metal connector is configured such that the first linear portion of the fastening member and the second linear portion of the frame-shaped member support the lower main bar of the steel-bar truss from the lower surface side thereof. This can suppress the tilting of the metal connector. The engaging portion of the fastening member is configured to engage with the lower main bar of the steel bar truss in a state of being wrapped around the lower main bar. As a result, the metal connector is less likely to be detached from the lower main reinforcement, and is more stably engaged with the steel bar truss. Therefore, the strength and stability of the fixation of the metal connector and the lower main bead can be improved.
A fourth aspect of the invention provides the metal connector according to the second aspect of the invention, wherein the fastening member is configured such that the first linear portion is in contact with an upper surface side of the lower main rib of the steel truss and the engaging portion is attached in a state of being wrapped around a lower surface side of the lower main rib, and the second linear portion is provided in the frame-shaped member so as to bridge 2 lower main ribs.
According to the fourth aspect of the invention, the metal connector is fixed to the bottom plate portion in a state where the second linear portion of the frame-shaped member is bridged over the lower main bead. The engaging portion of the fastening member is attached to the lower main bar of the steel bar truss in a state of being wrapped around the lower main bar. Therefore, the metal connecting piece is difficult to be separated from the lower main rib, and is more stably clamped on the steel bar truss. Therefore, the strength and stability of the fixation of the metal connector and the lower main bead can be improved.
A fifth aspect of the invention provides the metal joint according to any one of the second to fourth aspects of the invention, wherein the frame-shaped member is disposed adjacent to an inclined portion of an end portion of the lattice member, the inclined portion connecting the peak portion and the trough portion, in a longitudinal direction of the steel truss.
According to the fifth aspect of the invention, the metal connector is configured such that the expanded portion of the frame-like member is disposed at a position closer to the valley portion of the lattice material of the steel bar truss. Thereby, the steel bar truss is more stably fixed to the plate surface of the bottom plate portion.
A sixth aspect of the invention provides the metal connector according to any one of the second to fifth aspects of the invention, wherein the frame-shaped member is formed of a material having the same diameter and the same material as the lattice material of the steel bar truss.
According to the sixth invention, the frame-like member of the metal connecting member is formed of the same material having the same diameter as the lattice material of the steel bar truss. This makes it possible to fix the frame-like member to the plate surface of the bottom plate portion under the same conditions as in the step of fixing the valley portions of the lattice material to the plate surface of the bottom plate portion. Therefore, the labor for setting the welding conditions can be reduced, and the work efficiency of the corrugated board manufacturing process can be improved.
A seventh aspect of the invention provides the metal connector according to the first aspect of the invention, wherein the fastening members are opposed to each other so that the first straight portions sandwich the second rod-shaped portion from both sides in a radial direction of the second rod-shaped portion.
According to the seventh aspect of the invention, the fastening member of the metal joint is engaged with and abutted against the lower main bead at the engaging portion thereof. The first straight portion of the fastening member supports the second rod-shaped portion of the support member of the metal connector so as to sandwich the second rod-shaped portion from both sides in the radial direction. According to this structure, the number of portions of the metal connector abutting against the lower main bead increases, and the strength and stability of fixing the metal connector to the lower main bead can be improved.
An eighth aspect of the invention provides the metal connector according to the seventh aspect of the invention, wherein the fastening member is configured to be engaged and attached in a state where the first straight portion is in contact with a lower surface side of the lower bead.
According to the eighth aspect of the invention, the metal joint is configured to be attached such that the first linear portion of the fastening member is positioned on the lower surface side of the lower main bead. Therefore, the tilting of the metal connector mounted on the lower main rib can be restrained, and the fixing strength and stability of the metal connector and the lower main rib can be improved.
The reinforcing bar truss with metal connecting pieces of the ninth invention comprises: the metal connecting member according to any one of the second to sixth inventions, and a steel bar truss; the pair of lattice members of the steel truss are opposed to each other so as to sandwich the upper main rib from both sides in a width direction intersecting with a longitudinal direction of the upper main rib, the mountain portions are joined to the upper main rib, and intermediate portions between the mountain portions and the trough portions are joined to the lower main rib, respectively, the engaging portions of the fastening member of the metal link are engaged with the lower main rib of the steel truss, and the frame-shaped member of the metal link is positioned adjacent to an inclined portion at an end of the lattice member in the longitudinal direction of the steel truss, the inclined portion connecting the mountain portions and the trough portions.
According to the ninth aspect of the invention, the metal connector at the end of the steel bar truss is configured such that the fastening member is engaged with the lower main rib of the steel bar truss, the frame-shaped member abuts against the lower main rib at a position closer to the lattice member, and the expanded portion is fixed to the bottom plate portion. In this way, in the steel bar truss with the metal connecting member, the valley portion of the lattice material at the end of the steel bar truss and the expanded portion of the frame-like member are fixed closer to the bottom plate portion of the corrugated board. Therefore, the work efficiency of joining the steel bar truss with the metal connecting piece and the bottom plate portion can be improved.
The reinforcing bar truss with metal connecting pieces of the tenth invention comprises: the metal connecting piece of the seventh invention or the eighth invention, and a steel bar truss; the pair of lattice members of the steel bar truss are opposed to each other so as to sandwich the upper main rib from both sides in a width direction intersecting with a longitudinal direction of the upper main rib, the peak portions are joined to the upper main rib, and intermediate portions between the peak portions and the trough portions are joined to the lower main rib, respectively, and the engaging portion of the fastening member of the metal joint is engaged with the lower main rib of the steel bar truss.
According to the tenth aspect of the invention, the lower main rib of the steel bar truss is engaged with and abutted against the engaging portion of the fastening member of the metal connector, and the metal connector is stably engaged with the steel bar truss. Thus, the strength of fixing the metal connector and the steel bar truss can be maintained, and the steel bar truss with the metal connector can be formed.
An eleventh aspect of the invention provides the steel bar truss with a metal link according to the ninth or tenth aspect of the invention, wherein the fastening member of the metal link is positioned on a center side of an inclined portion of an end portion of the lattice member, the inclined portion connecting the peak portion and the trough portion, in a longitudinal direction of the steel bar truss.
According to the eleventh aspect of the invention, in the metal connector, the fastening member is disposed on the center side of the inclined portion of the end portion of the lattice member in the longitudinal direction of the steel truss, and engages with the lower main rib of the steel truss. Thus, in the metal connector, the fastening member is not displaced toward the end side of the steel bar truss from the inclined portion of the lattice material, and therefore, the metal connector can be prevented from falling off the steel bar truss.
A twelfth aspect of the invention provides the reinforcing bar truss with metal links of the tenth aspect of the invention, wherein in the fastening member of the metal link, an inclined portion of an end portion of the lattice material that connects the peak portion and the trough portion is positioned between the first linear portions that face each other in a longitudinal direction of the reinforcing bar truss.
According to the twelfth aspect of the invention, the metal connector is engaged with the lower main bar of the steel bar truss so that the inclined portion of the lattice material of the steel bar truss is positioned between the first linear portions of the fastening members. Thus, the fastening member sandwiches the inclined portion of the lattice material, and therefore, the metal connecting member can be prevented from falling off the steel bar truss.
The corrugated board of the thirteenth invention, which has the steel bar truss with the metal connecting member of any one of the ninth invention to the eleventh invention, and the bottom plate portion made of metal; the reinforcing steel bar truss with the metal connecting piece is integrally fixed on the plate surface of the bottom plate part in a state that a plurality of reinforcing steel bar trusses are arranged in parallel at a predetermined interval.
According to the thirteenth aspect of the present invention, the reinforcing bar truss is integrally fixed to the bottom plate. Further, a metal connector is attached to the steel truss, and 2 lower main reinforcements of the steel truss are engaged with and abutted against the engaging portions of the fastening members of the metal connector. Further, the support member of the metal connector is disposed so that the first rod-shaped portion is along the plate surface of the bottom plate portion. According to this structure, the metal connector is stably engaged with the steel bar truss, and the strength of fixing the metal connector and the steel bar truss can be maintained.
The method for manufacturing a steel bar truss with a metal connecting piece of the fourteenth invention comprises the following steps: a steel bar truss forming process for forming the steel bar truss, wherein the steel bar truss is provided with: an upper main rib extending linearly, 2 lower main ribs extending linearly in parallel below the upper main rib, and a pair of lattice members formed in a wave shape repeating a peak portion and a valley portion along a longitudinal direction of the upper main rib, the peak portion being joined to the upper main rib, and an intermediate portion between the peak portion and the valley portion being joined to the lower main rib; a support member forming step of forming a support member having a first rod-shaped portion extending in a rod shape and a second rod-shaped portion formed by bending and extending one end of the first rod-shaped portion; a fastening member forming step of forming a fastening member having a first linear portion that intersects and is joined to the second bar-shaped portion of the support member, and an engaging portion that maintains a state of being engaged with the lower main bar of the steel bar truss at both ends of the first linear portion; a metal connector molding step of joining the support member and the fastening member to form a metal connector; and a clamping process of clamping the metal connecting piece to the steel bar truss.
According to the fourteenth aspect of the present invention, in the engaging step of engaging the metal connector with the steel bar truss, it is not necessary to weld the lower main bar and the metal connector, and the work of attaching the metal connector to the steel bar truss is facilitated. Therefore, the work efficiency of the manufacturing process of the steel bar truss with the metal connecting piece can be improved.
A fifteenth aspect of the invention is the method of manufacturing a steel truss with a metal connecting member of the fourteenth aspect of the invention, wherein in the engaging step, the metal connecting member is attached after the steel truss is elastically deformed so that 2 lower main tendons of the steel truss are brought close to each other, and the metal connecting member is engaged with the steel truss.
According to the fifteenth aspect of the present invention, 2 lattice members are joined to the upper main rib of the steel bar truss so as to sandwich the upper main rib, and the lower main ribs separated in parallel to each other are joined to the lattice members, respectively. According to this structure, the steel bar truss is elastically deformed, and the interval between the 2 lower main bars can be temporarily narrowed. Therefore, the metal connecting member can be easily attached, and the work efficiency of the manufacturing process of the steel bar truss with the metal connecting member can be improved.
The method for manufacturing a corrugated board according to the sixteenth invention includes: a steel bar truss forming process for forming the steel bar truss, wherein the steel bar truss is provided with: an upper main rib extending linearly, 2 lower main ribs extending linearly in parallel below the upper main rib, and a pair of lattice members formed in a wave shape repeating a peak portion and a valley portion along a longitudinal direction of the upper main rib, the peak portion being joined to the upper main rib, and an intermediate portion between the peak portion and the valley portion being joined to the lower main rib; a support member forming step of forming a support member having a first rod-shaped portion extending in a rod shape and a second rod-shaped portion formed by bending and extending one end of the first rod-shaped portion; a fastening member forming step of forming a fastening member having a first linear portion that intersects and is joined to the second bar-shaped portion of the support member, and an engaging portion that maintains a state of being engaged with the lower main bar of the steel bar truss at both ends of the first linear portion; a metal connector molding step of joining the support member and the fastening member to form a metal connector; and a fixing step of fixing the valley portions of the steel bar trusses to a plate surface that is a bottom plate portion of a structure for a concrete floor slab.
According to the sixteenth aspect of the present invention, in the engaging step of engaging the metal connector with the steel bar truss, it is not necessary to weld the lower main bar and the metal connector, and the work of attaching the metal connector to the steel bar truss is facilitated. Therefore, the work efficiency of the corrugated board manufacturing process can be improved.
A seventeenth invention is the method for manufacturing a corrugated board according to the sixteenth invention, wherein the frame-shaped member forming step forms the frame-shaped member, and the frame-shaped member includes: a second linear portion intersecting and joined to the second rod-shaped portion of the support member, and an expanding portion configured such that both ends of the second linear portion extend toward the plate surface of the bottom plate portion, and lower ends of the second linear portion expand laterally so as to be separated from each other, and are brought into contact with the plate surface of the bottom plate portion; a metal connector molding step of joining the support member, the fastening member, and the frame-shaped member to form a metal connector; and a welding step of welding the expanded portion of the frame-shaped member of the metal connector to the plate surface of the bottom plate portion.
According to the seventeenth invention, the expanded portion of the frame-like member of the metal connector is welded to the bottom plate portion of the corrugated board. Thereby, the metal connector is stably fixed to the corrugated board, and the strength of fixing of the steel bar truss and the bottom plate portion can be improved.
An eighteenth aspect of the present invention is the method for manufacturing a corrugated board according to the sixteenth or seventeenth aspect, wherein the engaging step is performed before the fixing step.
According to the eighteenth aspect of the invention, after the metal connector is engaged with the steel bar truss, the steel bar truss is fixed to the bottom plate portion. By performing the engaging step before the fixing step in this manner, the metal connector can be engaged with the steel bar truss without interfering with the bottom plate portion. Therefore, in the engaging step, the work of attaching the metal connector to the steel bar truss becomes easier, and the attaching direction can be arbitrarily selected. Therefore, the work efficiency of the corrugated board manufacturing process can be improved.
ADVANTAGEOUS EFFECTS OF INVENTION
The present invention can provide a metal connector, a steel bar truss with a metal connector, a method for manufacturing the same, a corrugated board, and a method for manufacturing the same, in which the steel bar truss and the metal connector provided in parallel in the corrugated board are engaged with the main bar without welding, thereby improving the work efficiency of connection and maintaining the strength of connection and fixation.
Drawings
Fig. 1 is a perspective view of a steel bar truss with a metal connecting member and corrugated boards juxtaposed therewith according to a first embodiment, and is a view showing that an end portion of the steel bar truss is cut (mountain-cut) at a mountain portion of a lattice material.
Fig. 2 is a perspective view of the steel bar truss with the metal connecting members and the corrugated boards juxtaposed thereto of the first embodiment, and is a view showing that the ends of the steel bar truss are cut off (valley-cut) at the valleys of the lattice material.
Fig. 3 is an exploded perspective view of the corrugated board of the first embodiment.
Fig. 4 is a view looking in the direction IV of fig. 1.
Fig. 5 is a view looking in the direction V of fig. 2.
Fig. 6 is a view showing a state of the steel bar truss in the corrugated board as viewed from a length direction.
Fig. 7 is a view looking in the direction VII of fig. 1.
Fig. 8 is a view looking in the direction VIII of fig. 2.
Fig. 9 is a view showing the steel bar truss with the metallic coupling member when viewing fig. 4 from the direction IX.
Fig. 10 is a view showing a state in which the metal connection member of the first embodiment is mounted to a mountain-cut steel bar truss.
Fig. 11 is a view showing a state in which the metal connecting member of the first embodiment is attached to the valley-cut steel bar truss.
Fig. 12 is a perspective view illustrating a state in which the metal connection member of the second embodiment is mounted to a mountain-cut steel bar truss.
Fig. 13 is a perspective view showing a state in which the metal connecting member of the second embodiment is attached to the valley-cut steel bar truss.
Fig. 14 is a view showing a steel bar truss with a metal connecting member of the second embodiment.
Fig. 15 is a view showing a state in which the metal connection member of the second embodiment is mounted to a mountain-cut steel bar truss.
Fig. 16 is a view showing a state in which the metal connecting member of the second embodiment is attached to the valley-cut steel bar truss.
Fig. 17 is a perspective view of a steel bar truss with a metal link and corrugated boards juxtaposed thereto in a third embodiment, and is a view showing a state in which the metal link is mounted on a mountain-cut steel bar truss.
Fig. 18 is a perspective view of a steel bar truss with a metal connecting member and corrugated boards juxtaposed thereto in a third embodiment, and is a view showing a state in which the metal connecting member is attached to a valley-cut steel bar truss.
Fig. 19 is an exploded perspective view of a corrugated board of the third embodiment.
Fig. 20 is a view looking in the XX direction in fig. 17.
Fig. 21 is a view showing a state in which the metal connection member of the third embodiment is installed on the outer side of the mountain-cut steel bar truss.
Fig. 22 is a view showing a steel bar truss with a metal connecting member in which a metal connecting member of the third embodiment is installed at the outer side of a valley-cut steel bar truss.
Fig. 23 is a view showing a state in which the metal connector of the third embodiment is attached to the center side of the inclined portion of the reinforcement truss having the mountain-cut.
Fig. 24 is a view showing a state in which the metal connector of the third embodiment is attached to the center side of the inclined portion of the valley-cut steel bar truss.
Fig. 25 is a view showing a state in which the metal connector of the third embodiment is mounted to a mountain-cut steel bar truss such that the inclined portion is located between fastening members.
Fig. 26 is a view showing a state in which the metal connector of the third embodiment is attached to the valley-cut steel bar truss such that the inclined portion is positioned between the fastening members.
Fig. 27 is a view showing the steel bar truss with the metallic coupling member when viewing fig. 20 from the direction XXVII.
Fig. 28 is a diagram showing a metal connecting member of the fourth embodiment.
Fig. 29 is a view showing a state in which the metal connection member of the fourth embodiment is mounted to a mountain-cut steel bar truss.
Fig. 30 is a view showing a state in which the metal connecting member of the fourth embodiment is attached to a valley-cut steel bar truss.
Fig. 31 is a view showing a state in which the metal connection member of the fifth embodiment is mounted to a mountain-cut steel bar truss.
Fig. 32 is a view showing a state in which the metal connecting member of the fifth embodiment is attached to a valley-cut reinforcing bar truss.
Fig. 33 is a view showing a steel bar truss with a metal connecting member of the fifth embodiment.
Fig. 34 is an exploded perspective view of the metal connecting member of the first embodiment.
Fig. 35 is an exploded perspective view of the metal connecting member of the third embodiment.
Fig. 36 is a view showing a process of elastically deforming the steel bar trusses and installing the metal connecting members.
Fig. 37 is a schematic view of a process of joining the steel bar truss with the metal connecting member to the bottom plate portion and a welding apparatus.
Description of the reference numerals
1: corrugated board,
2: a steel bar truss,
3. 203, 303, 403, 503: a metal connecting piece,
4: a steel bar truss with a metal connecting piece,
5: a main body beam,
10: an upper main rib,
20: a lower main rib,
30: a grid material,
31: a mountain part,
32: a valley part,
33: a first joint part,
34: a second joint part,
36: a bending point,
37: a foot part,
38: an inclined part,
38U: an upper inclined portion,
38D: a lower inclined part,
40: a bottom plate part,
41: a protruding strip part,
50: a support member,
51: a first rod-like portion,
52: a second rod-like portion,
60: a fastening member,
61: a first straight line part,
62: an engaging portion,
63: a guide member,
70: a frame-shaped member,
71: a second straight line part,
72: an expansion portion.
Detailed Description
Hereinafter, an embodiment of the present invention will be described with reference to fig. 1 to 37. The metal connector 3 according to the embodiment of the present invention is used for, for example, a construction work such as a concrete floor, and is a member for fixing the corrugated board 1 to the body beam 5 of a building. The corrugated board 1 is integrally formed with the steel bar truss 2 and the bottom plate 40, which is a structural material used for a concrete floor, and is erected on the main beam 5 of the building at the construction site. That is, a plurality of corrugated boards 1 are laid between the main body beams 5 in a state of being erected in parallel. After necessary reinforcement work is performed on the steel bar truss 2, concrete is poured. Further, the end of the corrugated board 1 is fixed to the main body girder 5 by the metal connector 3.
In the first to fifth embodiments, the metal connector, the steel bar truss with the metal connector, the manufacturing method thereof, the corrugated board, and the manufacturing method thereof according to the first embodiment will be described with respect to the portions having substantially the same structure, operation effect, and the like. In the second to fifth embodiments, the same reference numerals are given to those parts having substantially the same configurations, operational effects, and the like as those of the first embodiment, and the description thereof is omitted, and the different parts will be described in detail.
< first embodiment >
First, a first embodiment will be explained. Fig. 1 and 2 are perspective views of a steel bar truss 4 with a metal connecting member and corrugated boards 1 arranged in parallel. In the corrugated board 1, a plurality of steel trusses 2 are integrally fixed to a plate surface of a metal bottom plate 40 in a state of being arranged in parallel at a predetermined interval. Further, the metal connector 3 is attached to the lower main bar 20 at the end of the steel truss 2. The sizes of the steel trusses 2 and the bottom plate portion 40 are set according to the area and thickness of the floor slab or the like.
< Structure of steel bar truss >
As shown in fig. 1, 2, and 6 to 9, the steel-bar truss 2 has 1 upper main bar 10, 2 lower main bars 20, and a pair of lattice materials 30. The upper main bead 10 and the 2 lower main beads 20 extend linearly, and the 2 lower main beads are disposed below the upper main bead 10 in parallel. The pair of lattice members 30 are formed in a wave shape in which peak portions 31 and valley portions 32 are repeated along the longitudinal direction of the upper main bead 10, and are arranged so as to face each other so as to sandwich the upper main bead 10 from both sides in the width direction intersecting the direction in which the upper main bead 10 extends, and the peak portions 31 are joined to the upper main bead 10. The lower main beads 20 are arranged obliquely below the upper main beads 10 so that 1 lower main bead 20 is in contact with each side surface of the pair of lattice members 30.
The upper and lower beads 10 and 20 are formed linearly by axially drawing a wire made of metal. For example, shaped steel bars may also be used. In addition, reinforcing bars having different diameters are used for the upper main bar 10 and the lower main bar 20, respectively. Further, the diameter of the upper beads 10 is larger than that of the lower beads 20. The reinforcing bars used for these main bars may be the same diameter reinforcing bars used for the upper main bar 10 and the lower main bar 20, or reinforcing bars having different diameters may be used for each of the upper main bar and the lower main bar. The height positions of the upper main link 10 and the lower main link 20 can be appropriately set according to the size of the steel truss 2. The pair of lattice members 30 are formed by bending metal wire rods in a wavy shape in the longitudinal direction. For example, a wire coil may also be used.
The pair of lattice members 30 are formed by repeating the peak portions 31 and the valley portions 32 in the longitudinal direction, and have inclined portions 38 between the peak portions 31 and the valley portions 32, that is, upper inclined portions 38U extending obliquely upward and lower inclined portions 38D extending obliquely downward.
Specifically, the lattice material 30 extending obliquely upward in the longitudinal direction is bent so that the orientation thereof is changed to be obliquely downward. The curved portion of the lattice material 30 bent so as to change its orientation from obliquely upward to obliquely downward is the peak portion 31. The lattice material 30 extending straight obliquely downward is bent so that the orientation thereof is changed to be obliquely upward. The curved portions of the lattice material 30 bent from obliquely lower to obliquely upper directions form the valley portions 32. In the longitudinal direction, a portion extending obliquely upward from the valley portion 32 toward the peak portion 31 is an upward inclined portion 38U, and a portion extending obliquely downward from the peak portion 31 toward the valley portion 32 is a downward inclined portion 38D.
In other words, the lattice material 30 is bent so that the upper inclined portion 38U extends toward the peak portion 31 in the longitudinal direction and the direction is changed to be obliquely downward at the peak portion 31. The lower inclined portion 38D extends toward the trough portion 32, and is bent at the trough portion 32 so as to change the direction to an obliquely upward direction. The end portions of the lattice material 30 may be formed by cutting at the mountain portions 31 (see fig. 1 and 7) or by cutting at the valley portions 32 (see fig. 2 and 8).
As shown in fig. 1, 2, and 6, the lattice 30 is formed of a pair of one lattice 30a and the other lattice 30 b. These lattice members 30a and 30b are arranged to face each other so as to sandwich the upper bead 10 from both sides in the width direction intersecting the direction in which the upper bead 10 extends. The trough portions 32a and 32b facing each other across the upper main bead 10 are separated from each other, and are arranged so that the lattice members 30a and 30b have expanded portions in the width direction, respectively, to have an expanded structure. That is, the pair of lattice members 30 are arranged to form a triangular shape when viewed in the longitudinal direction. The separation distance L1 in the width direction of the opposed valley portions 32a, 32b can be set arbitrarily, and the lattice members 30a, 30b are expanded in accordance with the predetermined separation distance L1 in the width direction.
The lower main bead 20 is disposed so as to contact the side surfaces of the pair of lattice members 30a and 30 b. The upper main beads 10 and the 2 lower main beads 20 are separated from each other, respectively. The lower bead 20 is positioned obliquely downward along the upper bead 10. The upper and lower cage bars 10 and 20 are preferably parallel to each other.
The lattice material 30 has a first joining site 33 and a second joining site 34. The first engagement portions 33 are respectively set at portions where the upper outer peripheral surface of the upper main bead 10 contacts the apex portion of the peak portion 31 in the lattice 30. In the first joining site 33, the upper main bead 10 and the pair of lattice materials 30 are joined by welding. In addition, the position of the first engagement portion 33 can be set arbitrarily.
The second joining portions 34 are respectively set at portions of the pair of lattice materials 30a, 30b where the lower main bead 20 contacts the intermediate portions of the peak portions 31 and the trough portions 32. In each second joint portion 34, the lower main bead 20 and the lattice materials 30a and 30b are joined by welding. In addition, the position of the second engagement portion 34 can be set arbitrarily. That is, the second joint portion 34 may be provided on the inner side or the outer side of the steel-bar truss 2.
Referring to fig. 1, 2, and 6 to 9, the lattice 30 is disposed such that the peak portions 31a of one lattice 30a and the peak portions 31b of the other lattice 30b face each other, and the valley portions 32a of the one lattice 30a and the valley portions 32b of the other lattice 30b face each other. The lattice material 30 has a structure in which the peak portions 31 and the valley portions 32 overlap each other at the same amplitude and the same pitch. Therefore, the angle θ 1 of the peak portion 31 and the angle θ 2 of the trough portion 32 are fixed. In other words, in the drawings viewed from the width direction (see fig. 7 and 8), the ridge portions 31a of one lattice member 30a and the ridge portions 31b of the other lattice member 30b are arranged so as to overlap each other, and the valley portions 32a of the one lattice member 30a and the valley portions 32b of the other lattice member 30b are arranged so as to overlap each other.
The lattice material 30 has arbitrarily set bending points 36 between the second joining locations 34 and the trough portions 32. Each of the legs 37 is bent at a bending point 36. Specifically, at the bending point 36, the lattice members 30a and 30b are bent so that the trough portions 32a of one lattice member 30a and the trough portions 32b of the other lattice member 30b are separated from each other, and leg portions 37 are formed on the trough portions 32 side of the inclined portion 38. In other words, the pair of lattice materials 30 are bent horizontally outward in the width direction at the bending point 36. The leg 37 extends from the bending point 36 to the trough 32.
Referring to fig. 6, an angle θ 5 of expansion of the lattice material 30 as viewed in the longitudinal direction and an angle θ 6 of bending of the lattice material 30 at the bending point 36 are set so that the leg 37 is horizontal. The angle θ 5 of expansion and the angle θ 6 of bending can be arbitrarily set according to the size of the steel truss 2. This can reduce the expansion angle θ 5, thereby suppressing the expansion of the pair of lattice members 30 in the width direction. The pair of lattice members 30 may be arranged so as not to expand in the width direction and not to have an expanded portion in the width direction.
< Structure of Metal connecting Member >
As shown in fig. 1 and 2, the metal connecting member 3 is connected to an end of the corrugated board 1 erected on a main beam 5 of a building. Further, the steel bar trusses 2 are arranged in parallel on the plate surface of the bottom plate portion 40 of the corrugated board 1, and the metal connecting member 3 is engaged with the lower main bar 20 of the steel bar truss 2. The metal connector 3 includes a support member 50, a fastening member 60, and a frame-like member 70, and the fastening member 60 is engaged with the lower main rib 20 of the steel truss 2, and the frame-like member 70 is welded to the bottom plate portion 40, so that the support member 50 is joined to the main body beam 5.
Referring to fig. 10 and 11, the support member 50 has a first rod-shaped portion 51 and a second rod-shaped portion 52. The first bar-like portions 51 extend in the plate surface direction of the bottom plate portion 40 of the corrugated board 1, and are formed in parallel with the protruding portions 41 described later. The second rod-shaped portion 52 is configured such that one end of the first rod-shaped portion 51 is bent at an arbitrarily set bending point 55 and extends upward. The support member 50 is formed by bending a linear material made of iron into an L shape. For the iron material, for example, round steel bar is used. In addition, shaped steel bars may also be used.
The support member 50 is configured such that an end portion 53 on the first rod-like portion 51 side protrudes outward from an end portion in the longitudinal direction of the bottom plate portion 40. That is, the length of the first rod-like portion 51 is set so as to protrude outward by a predetermined amount from the end of the bottom plate 40. Further, when the corrugated board 1 is erected on the body beam 5, the end portion 53 side portion of the first bar-like portion 51 is joined to the body beam 5. The height H of the second bar-shaped part 52 is set between the height H1 on the lower surface side of the upper main rib 10 and the height H2 on the upper surface side of the lower main rib 20 of the steel bar truss 2, based on the plate surface of the bottom plate part 40. In other words, the second bar-shaped portion 52 is configured not to extend to the height position of the upper bead 10. Thus, the support member 50 can be disposed in a state in which the second rod-shaped portion 52 is positioned directly below the upper bead 10.
As shown in fig. 1 and 4, the fastening member 60 has a first linear portion 61, and engaging portions 62 are provided at both ends of the first linear portion 61. The first linear portion 61 is bridged over the 2 lower main tendons 20 of the steel bar truss 2. The engaging portions 62 are configured to maintain a state of engagement with the lower main bead 20. The fastening member 60 is attached in a state where the first linear portion 61 is in contact with the upper surface side of the lower bead 20 and the engaging portion 62 is wrapped around the lower surface side of the lower bead 20. That is, the first linear portion 61 is joined to the second rod-like portion 52 in a state where the engaging portions 62 at both ends thereof are bent downward.
The fastening member 60 is formed by bending a linear raw material made of metal. For example, a wire coil may also be used. The fastening member 60 of the present embodiment is made of the same material and the same diameter as the lattice member 30 of the steel truss 2 to be connected. The length of the first linear portion 61 is set according to the interval of the 2 lower main tendons 20 of the steel bar truss 2. The engaging portion 62 is formed by being curved with a curvature corresponding to the diameter of the lower bead 20. In the present embodiment, both ends of the first linear portion 61 are curved so as to follow the outer peripheral surface of the lower main bead 20, and the engaging portion 62 is formed. The engaging portion 62 may be engaged without being wrapped around the lower surface side of the lower bead 20. For example, as shown in fig. 2 and 5, the engaging portion 62 may extend downward from both ends of the first linear portion 61 in proximity to the lower main bead 20.
As shown in fig. 1, 2, 4, and 5, the frame-shaped member 70 includes a second linear portion 71 that is bridged over the 2 lower main beads 20, and an expanding portion 72 that expands both ends of the second linear portion 71 outward. The second straight portion 71 is bridged between 2 lower main beads 20. The expanding portion 72 extends from both ends of the second linear portion 71 toward the plate surface of the bottom plate portion 40, expands laterally so that the lower ends thereof are separated from each other, and comes into contact with the plate surface of the bottom plate portion 40. The expanded portion 72 is expanded outward in the longitudinal direction of the second linear portion 71. Specifically, both ends of the second linear portion 71 extend downward, are bent at positions corresponding to the height of the protruding portions 41 on the plate surface of the bottom plate portion 40, and extend to the protruding portions 41 in the plate surface direction of the bottom plate portion 40. In addition, the expanded portion 72 can be engaged with the protruding strip portion 41.
The frame member 70 is formed by bending a linear material made of metal into a convex shape. For example, a wire coil may also be used. The frame member 70 of the present embodiment is configured by setting the same diameter and the same material as the lattice member 30 of the steel truss 2 to be connected. The second linear portion 71 of the frame-shaped member 70 extends in the horizontal direction, and both ends of the second linear portion 71 are bent from the portions in contact with the lower main bead 20, thereby forming the expanded portion 72. The length of the second straight portion 71 is set according to the interval of the 2 lower main tendons 20 of the steel bar truss 2.
In the metal connector 3, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 intersect with the second rod-shaped portion 52 of the support member 50, respectively, and are joined to face each other so as to sandwich the second rod-shaped portion 52 from both sides in the radial direction of the second rod-shaped portion 52 with respect to the second rod-shaped portion 52. Further, the middle portion in the longitudinal direction of the first linear portion 61 and the middle portion in the longitudinal direction of the second rod-shaped portion 52 are joined so as to be in contact with each other, and the middle portion in the longitudinal direction of the second linear portion 71 and the middle portion in the longitudinal direction of the second rod-shaped portion 52 are joined so as to be in contact with each other. The first linear portion 61 and the second linear portion 71 intersect the direction in which the first rod-like portion 51 extends.
In the metal connector 3, the frame-shaped member 70 is disposed adjacent to the inclined portion 38 of the end portion of the lattice 30 connecting the peak portion 31 and the trough portion 32 in the longitudinal direction of the steel truss 2, and is attached to the steel truss 2. In other words, as shown in fig. 10 and 11, the metal connector 3 is configured such that the second linear portion 71 of the frame-like member 70 is attached to the inclined portion 38 of the first linear portion 61 of the opposed fastening member 60.
Structure of steel bar truss with metal connecting piece
As shown in fig. 1 and 2, the metal-link-equipped steel truss 4 is configured by engaging and attaching the metal link 3 to the steel truss 2. The metal connector 3 is configured to be attached to either one of the mountain-cut steel trusses 2 (see fig. 1 and 7) in which the lattice member 30 is cut at the mountain portion 31 and the valley-cut steel trusses 2 (see fig. 2 and 8) in which the lattice member 30 is cut at the valley portion 32. The first rod-shaped portion 51 of the support member 50 is configured such that an end portion 53 extends outward from an end portion of the bottom plate portion 40.
Fig. 1, 4, 7, and 10 are views showing an example of a state in which the metal connecting member 3 is mounted on the mountain-cut steel bar truss 2. In the metal connector 3, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 opposed to each other are bridged so as to be in contact with the upper surface side of the lower main rib 20 of the steel-bar truss 2, and the engaging portions 62 at both ends of the first linear portion 61 are engaged with the lower main rib 20 in a state of being wrapped around the lower surface side of the lower main rib 20. The frame-shaped member 70 is configured such that the expanded portions 72 extend downward from both ends of the second linear portion 71.
In the metal connector 3, the fastening member 60 and the frame member 70 are positioned on the end side of the inclined portion 38 of the end portion of the lattice material 30, which connects the peak portion 31 and the trough portion 32, in the longitudinal direction of the steel-bar truss 2. Specifically, as shown in fig. 10, in the reinforcement truss 2 cut at a mountain, the first linear portion 61 of the fastening member 60 is positioned on the end side of the lower inclined portion 38D. Further, the second straight portion 71 of the frame member 70 is disposed adjacent to the lower inclined portion 38D. In this way, the second linear portion 71 is positioned closer to the inclined portion 38 than the opposing first linear portion 61, and thereby the expanded portion 72 is configured to be disposed closer to the leg portion 37 of the end portion of the steel-bar truss 2.
Fig. 2, 5, 8, and 11 are views showing an example of a state in which the metal connection member 3 is mounted on the valley-cut steel bar truss 2. The metal link 3 may be configured to be attached such that the fastening member 60 and the frame-like member 70 are positioned on the center side of the inclined portion 38 of the end portion of the lattice material 30, which connects the peak portion 31 and the trough portion 32, in the longitudinal direction of the steel-bar truss 2. Specifically, as shown in fig. 11, in the valley-cut steel bar truss 2, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 are positioned on the center side of the upper inclined portion 38U. Further, the second linear portion 71 of the frame member 70 is disposed adjacent to the upper inclined portion 38U.
In this way, the fastening member 60 and the frame-shaped member 70 are positioned closer to the center of the steel truss 2 than the inclined portion 38, and thereby the movement of the metal connector 3 toward the end side of the steel truss 2 is locked at the second engagement portion 34. Further, the second linear portion 71 is located closer to the inclined portion 38 than the first linear portion 61 facing thereto, and thereby the expanded portion 72 is configured to be disposed closer to the leg portion 37 of the end portion of the steel-bar truss 2.
As shown in fig. 2 and 5, the fastening member 60 of the metal connector 3 may be configured such that the engaging portion 62 is adjacent to the lower bead 20 and extends downward from both ends of the first linear portion 61. Thus, the metal connecting member 3 can be easily attached to the steel truss 2 even between the upper inclined portion 38U and the lower inclined portion 38D of the lattice 30.
In addition, the metal link 3 may be configured such that the fastening member 60 is attached such that the inclined portion 38 connecting the peak portion 31 and the trough portion 32 of the end portion of the lattice material 30 is positioned between the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70, which are opposed to each other, in the longitudinal direction of the steel-bar truss 2. That is, the metal connector 3 may be attached to the first linear portion 61 and the second linear portion 71 at positions sandwiching the inclined portion 38. By positioning the inclined portion 38 between the first linear portion 61 and the second linear portion 71 in this way, the metal connector 3 is engaged with the lower bead 20 and the inclined portion 38 of the lattice 30 at the second joint portion 34.
The metal connector 3 can be attached to any position of the end of the steel truss 2, depending on the installation position of the corrugated plate 1 erected on the main body beam 5, the cutting position of the lattice material 30 of the steel truss 2, and the like.
< Structure of corrugated board >
As shown in fig. 1 and 2, the corrugated board 1 has a metal bottom plate 40, and a plurality of steel trusses 2 are integrally fixed to the plate surface of the bottom plate 40 in a state of being arranged in parallel at a predetermined interval. The interval L5 between the upper main tendons 10 of the steel bar truss 2 is set according to the strength of the concrete floor (see fig. 6). In addition, a metal connector 3 is attached to the steel truss 2. That is, the corrugated board 1 is configured by integrally fixing a plurality of metal-link-attached steel trusses 4 to the board surface of the bottom plate 40 in a state where the steel trusses are arranged in parallel at a predetermined interval.
The bottom plate portion 40 is a plate member made of metal, and for example, a hot-dip galvanized steel plate may be used. A projecting portion 41 is formed on the surface of the bottom plate portion 40 so as to match the installation position of the metal-link-equipped steel truss 4. The protruding portion 41 is formed by projecting the bottom plate portion 40 upward in the thickness direction thereof in a convex shape, and linearly extends along the longitudinal direction of the bottom plate portion 40. The cross-sectional shape of the protruding strip 41 is semicircular. The size of the bottom plate portion 40 can be arbitrarily set according to the area of the concrete floor. The width of the bottom plate portion 40 is set in accordance with the interval L5 of the upper main bead 10.
The valley portions 32 of the lattice material 30 are joined to the protruding portions 41. Specifically, the leg portion 37 formed on the valley portion 32 side of the inclined portion 38 of the lattice material 30 is joined by welding to the fixing portion 39 which is a portion abutting against the ridge portion 41. Further, the expanded portion 72 of the frame-like member 70 of the metal connector 3 is joined to the welded portion 73, which is a portion in contact with the protruding portion 41. In this way, the steel bar truss 2 and the metal connecting member 3 are joined to the bottom plate 40, respectively, to form the corrugated board 1 integrally.
The corrugated board 1 is formed by arranging two steel bar trusses 4 with metal connecting pieces on a bottom board part 40 in parallel to form a group of corrugated boards 1. The number of the metal-link-equipped steel trusses 4 provided on the bottom plate portion 40 can be set arbitrarily. For example, three steel trusses 4 with metal connectors may be arranged in parallel to form a set of corrugated boards 1. A plurality of corrugated boards 1 may be spread in a row according to the size of the floor. When a plurality of corrugated boards 1 are arranged in the width direction, the end edge portions of the adjacent bottom plate portions 40 are engaged with each other. For example, the folded pieces that engage with each other may be formed by bending the end edge portion of the bottom plate portion 40 in the longitudinal direction.
The corrugated board 1 to which the valley-cut steel bar trusses 2 are fixed is configured such that the leg portions 37 of the lattice 30 are located at the end portions of the bottom plate portions 40 in the longitudinal direction, and when the corrugated board 1 is erected on the main body beams 5, the leg portions 37 are hung on the main body beams 5 (see fig. 11).
Method for manufacturing steel bar truss with metal connecting piece
Next, a method for manufacturing a steel bar truss with a metal connecting member will be described with reference to fig. 1 to 11 and 34. The steel bar truss 4 with the metal connecting member of the present embodiment is manufactured through at least a steel bar truss forming process, a support member forming process, a fastening member forming process, a frame-shaped member forming process, a metal connecting member forming process, and an engaging process of engaging the metal connecting member 3 with the steel bar truss 2.
< Steel bar truss Forming Process >
In the steel bar truss forming process, the steel bar truss 2 is formed. As shown in fig. 1 to 3, the steel bar truss 2 has 1 upper main bar 10, 2 lower main bars 20, and a pair of lattice materials 30. The upper main bead 10 and the 2 lower main beads 20 extend linearly, and the 2 lower main beads are respectively located below the upper main bead 10 in parallel. The upper main bead 10 and the lower main bead 20 are formed by linearly drawing in the axial direction from a steel material (see fig. 3). In the present embodiment, a deformed steel bar is used. The diameter of the bead may be set to be different from or the same as the diameter of the upper bead 10, for example, larger than the diameter of the lower bead 20.
The pair of lattice members 30 are formed in a wave shape in which mountain portions 31 and valley portions 32 are repeated in the longitudinal direction of the upper main bead 10, and face each other so as to sandwich the upper main bead 10 from both sides in the width direction intersecting the direction in which the upper main bead 10 extends. In addition, the peak portions 31 are joined to the upper main beads 10, and intermediate portions of the peak portions 31 and the trough portions 32 are joined to the lower main beads 20.
The lattice material 30 is formed by bending a linear material (e.g., a wire coil) made of metal so as to form a wave shape in which the peak portions 31 and the trough portions 32 are repeated in the longitudinal direction. Specifically, the lattice material 30 extending diagonally upward and linearly is bent in the longitudinal direction so as to change the direction to diagonally downward. The curved portion of the lattice material 30 bent so as to change its orientation from obliquely upward to obliquely downward is the peak portion 31. The lattice material 30 extending straight obliquely downward is bent so that the orientation thereof is changed to be obliquely upward. The curved portions of the lattice material 30, which are bent so as to change the direction from obliquely downward to obliquely upward, form the valley portions 32. In the longitudinal direction, a portion extending obliquely upward from the valley portion 32 toward the peak portion 31 is an upward inclined portion 38U, and a portion extending obliquely downward from the peak portion 31 toward the valley portion 32 is a downward inclined portion 38D.
In other words, in the lattice material 30, the upper inclined portion 38U extends toward the ridge portion 31 in the longitudinal direction, and is bent so that the direction of the ridge portion 31 changes to be obliquely downward. The lower inclined portion 38D extends toward the trough portion 32, and is bent so that the orientation thereof changes to be obliquely upward in the trough portion 32. The lattice material 30 has a structure in which the peak portions 31 and the valley portions 32 are repeated at the same amplitude and the same pitch. Thus, the angle θ 1 of the peak portion 31 and the angle θ 2 of the trough portion 32 are fixed (see fig. 6 and 9). The end portions of the lattice material 30 may be formed by cutting at the mountain portions 31 (see fig. 1 and 7) or by cutting at the valley portions 32 (see fig. 2 and 8).
The upper main bead 10, the lower main bead 20, and the lattice material 30 are arranged as follows. As shown in fig. 6 and 9, the lattice 30 is formed of a pair of one lattice 30a and the other lattice 30 b. The lattice materials 30a and 30b are opposed to each other so as to sandwich the upper bead 10 from both sides in the width direction intersecting the direction in which the upper bead 10 extends, and the apex portions of the ridge portions 31 are in contact with the upper outer peripheral surface of the upper bead 10.
The lower main bead 20 is disposed in contact with the side surfaces of the lattice members 30a and 30b at the intermediate portions between the peak portions 31 and the trough portions 32 of the lattice members 30a and 30 b. The upper main beads 10 and the 2 lower main beads 20 are separated from each other, respectively. The lower bead 20 is positioned obliquely downward along the upper bead 10. The upper and lower cage bars 10 and 20 are preferably parallel to each other.
The lattice materials 30a and 30b are expanded so as to have expanded portions in the width direction while being separated from each other by the respective trough portions 32a and 32b facing each other across the upper bead 10. That is, the pair of lattice members 30 are arranged to form a triangular shape when viewed in the longitudinal direction. The distance L1 in the width direction between the opposing trough portions 32a, 32b can be set arbitrarily. The lattice materials 30a and 30b are expanded in accordance with a predetermined separation distance L1 in the width direction (see fig. 6).
The pair of lattice members 30 are arranged such that the peak portions 31a of one lattice member 30a and the peak portions 31b of the other lattice member 30b face each other, and the valley portions 32a of the one lattice member 30a and the valley portions 32b of the other lattice member 30b face each other. In other words, in the drawings viewed from the width direction (see fig. 7 and 8), the ridge portions 31a of one lattice member 30a and the ridge portions 31b of the other lattice member 30b overlap each other, and the valley portions 32a of the one lattice member 30a and the valley portions 32b of the other lattice member 30b overlap each other.
The lattice materials 30a and 30b are provided with first engagement portions 33 at portions that contact the upper outer peripheral surface of the upper main bead 10. At the first joining portion 33, the upper main bead 10 and the pair of lattice materials 30 are joined by welding. In addition, the position of the first engagement portion 33 can be set arbitrarily. In the present embodiment, the first joining portions 33a and 33b are opposed to each other across the upper bead 10, and the welding points of the opposed lattice materials 30a and 30b and the upper bead 10 are overlapped with each other. At this welding point, i.e., at the first joining portions 33a, 33b arranged in a straight line along the upper main bead 10, welding is performed by a machine.
The lattice materials 30a and 30b have second joining portions 34 respectively formed at portions where the lower beads 20 contact intermediate portions of the peak portions 31 and the trough portions 32. At each second joint portion 34, the lower main bead 20 and the lattice materials 30a and 30b are joined by welding. In addition, the position of the second engagement portion 34 can be set arbitrarily. That is, the second joint portion 34 may be provided on the inner side or the outer side of the steel-bar truss 2. In the present embodiment, the second joint portions 34 are welded by a machine to be arranged linearly along the lower bead 20.
The lattice materials 30a, 30b are respectively provided with a bending point 36 between the second joining portion 34 and the valley portion 32. At the bending point 36, the lattice materials 30a, 30b are bent so that the trough portions 32a of one lattice material 30a and the trough portions 32b of the other lattice material 30b are separated from each other, and a foot portion 37 is formed on the trough portion 32 side of the inclined portion 38. In other words, at the bending point 36, the pair of lattice materials 30 are bent so as to be horizontal on the outer sides in the width direction. The leg 37 extends from the bending point 36 to the trough portion 32.
Next, a process of manufacturing the metal connector 3 will be described. As shown in fig. 1, 3 and 34, the metal connector 3 is formed by joining a fastening member 60 and a frame-like member 70 to a support member 50.
< support Member Forming Process >
In the support member forming step, a linear material made of iron, for example, a round reinforcing bar, is bent to form the support member 50. The support member 50 has a first rod-shaped portion 51 extending in a rod shape and a second rod-shaped portion 52 extending by bending one end of the first rod-shaped portion 51. Specifically, a bar-shaped reinforcing bar cut to a predetermined length is bent into an L-shape at a bending point 55 set at the middle in the longitudinal direction. The portion extending upward from the bending point 55 serves as the second rod-shaped portion 52, and the portion extending to the other side serves as the first rod-shaped portion 51. In the corrugated board 1, the first rod-like parts 51 are arranged to extend in the board surface direction of the bottom board 40. The support member 50 can be arbitrarily selected from the diameter of the reinforcing bar, and can be set to a smaller diameter than the lower main bar 20, for example. Further, deformed steel bars may also be used.
Referring to fig. 10 and 11, the support member 50 is configured such that the end 53 on the first rod-like portion 51 side protrudes outward from the end in the longitudinal direction of the bottom plate 40. That is, the length of the first rod-like portion 51 is set so as to protrude outward by a predetermined amount from the end of the bottom plate 40. The height H of the second rod-like portion 52 is set between the height H1 on the lower surface side of the upper main rib 10 and the height H2 on the upper surface side of the lower main rib 20 of the steel-bar truss 2, based on the plate surface of the bottom plate portion 40. In other words, the second bar-shaped portion 52 is configured not to extend to the height position of the upper bead 10. Thus, the support member 50 can be disposed in a state in which the second rod-shaped portion 52 is positioned directly below the upper bead 10.
< Molding Process of fastening Member >
In the fastening member forming step, a linear material made of metal is bent to form the fastening member 60. For example, a wire coil may also be used. The fastening member 60 has a first linear portion 61 and an engaging portion 62, the first linear portion 61 intersects and is joined to the second rod-shaped portion 52 of the support member 50, and the engaging portion 62 maintains a state of being engaged with the lower main rib 20 of the steel bar truss 2 at both ends of the first linear portion 61. Specifically, the engaging portion 62 is formed by bending both ends of the first straight portion 61 made of a linear wire in a curved shape having a curvature corresponding to the diameter of the lower main bead 20. In other words, the lower main bead 20 is curved along the outer peripheral surface thereof. The length of the first straight portion 61 is set according to the interval of the 2 lower main beads 20. The fastening member 60 may be formed of the same material and the same diameter as the lattice member 30 of the steel-bar truss 2.
As shown in fig. 4, the fastening member 60 is configured to wrap the engaging portion 62 around the lower surface side of the lower main rib 20 of the steel bar truss 2. As shown in fig. 5, the fastening member 60 may have a structure in which the engaging portions 62 extend downward from both ends of the first linear portion 61.
< Process for Forming frame-shaped Member >
In the frame member forming step, as shown in fig. 1 to 3 and 34, a metal material (for example, a wire coil) having the same diameter and the same material as the lattice material 30 of the steel truss 2 is bent to form the frame member 70. The frame member 70 has a second linear portion 71 that is bridged over the 2 lower main beads 20, and an expanded portion 72 that expands both ends of the second linear portion 71 laterally, i.e., outward. Specifically, both ends of the second straight portion 71 made of a linear wire are bent and extended in a direction intersecting the second straight portion 71. The extended lower ends thereof are bent in a direction parallel to the second linear portion 71 and extend so as to be separated from each other. That is, the expanded portion 72 is configured to expand outward in the longitudinal direction of the second linear portion 71. The length of the second linear portion 71 is set according to the interval between the 2 lower main beads 20 (see fig. 4 and 5).
< Metal connecting Member Forming Process
In the metal joint forming process, the fastening member 60 and the frame-shaped member 70 are respectively joined to the support member 50, thereby forming the metal joint. Specifically, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 intersect and are joined to the second rod-shaped portion 52 of the support member 50. The first linear portion 61 and the second linear portion 71 are opposed to and parallel to the second rod-shaped portion 52 so as to sandwich the second rod-shaped portion 52 from both sides in the radial direction of the second rod-shaped portion 52. The first linear portion 61 and the second linear portion 71 are joined to each other in a state of intersecting the direction in which the first rod-like portion 51 extends.
As shown in fig. 4, the metal connector 3 is configured to be attached so as to be engaged with the first linear portion 61 of the fastening member 60 in contact with the upper surface side of the lower main bead 20. That is, the first linear portion 61 is joined to the second rod-like portion 52 with the engaging portions 62 bent downward from both ends thereof. In the present embodiment, the first straight portion 61 is joined by welding at a position where the middle portion in the longitudinal direction thereof is in contact with the middle portion in the longitudinal direction of the second rod-like portion 52.
As shown in fig. 4 and 5, the metal connector 3 is mounted in a state in which the second linear portion 71 of the frame-like member 70 is erected over the 2 lower main beads 20. That is, the second linear portion 71 is joined to the second rod-like portion 52 in a state where the expanded portion 72 is bent downward from both ends thereof and expanded outward. In the present embodiment, the second straight portion 71 is joined by welding at a position where the longitudinal middle portion thereof is in contact with the longitudinal middle portion of the second rod-shaped portion 52.
The method for manufacturing the steel bar truss with the metal connecting member does not need to follow the order of the steel bar truss forming process, the support member forming process, the fastening member forming process, the frame-shaped member forming process, and the metal connecting member forming process, and can be performed before the engaging process.
< engaging step >
Next, the engaging step will be explained. In the engagement step, the metal connector 3 is engaged with the steel bar truss 2. Specifically, the engaging portion 62 of the fastening member 60 is engaged in the longitudinal direction of the steel truss 2 so as to slide from the end portion side of the lower main rib 20. In the metal link 3, the fastening member 60 and the frame-shaped member 70 are located on the end side of the inclined portion 38 of the end portion of the lattice material 30 that connects the peak portion 31 and the trough portion 32 in the longitudinal direction of the steel-bar truss 2. Further, the frame-shaped member 70 is preferably attached so as to be disposed adjacent to the inclined portion 38 of the lattice material 30. Through this engagement process, the steel bar truss 4 with the metal connecting member is obtained. The first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame member 70 are laid on the upper surface side of the lower main rib 20.
The metal connector 3 can be attached to any position of the end of the steel truss 2, depending on the installation position of the corrugated plate 1 erected on the main body beam 5, the cutting position of the lattice material 30 of the steel truss 2, and the like. For example, the fastening member 60 and the frame-like member 70 of the metal connector 3 may be positioned on the center side of the inclined portion 38 of the end portion of the lattice material 30 in the longitudinal direction of the steel truss 2. In the engaging step, the metal coupler 3 may be engaged with the steel truss 2 by elastically deforming the steel truss 2 and attaching the metal coupler 3 so that the 2 lower main tendons 20 of the steel truss 2 approach each other (see fig. 36).
Method for producing corrugated board
Next, a method for manufacturing a corrugated board will be described. The corrugated board 1 is manufactured through the following processes: a steel truss forming step, a support member forming step, a fastening member forming step, a frame-shaped member forming step, a metal connector forming step, an engaging step, a fixing step of fixing the valley portions 32 of the steel truss 2 to the plate surface of the bottom plate portion 40, and a welding step of welding the frame-shaped member 70 of the metal connector 3 to the plate surface of the bottom plate portion 40. The reinforcing bar truss forming step, the support member forming step, the fastening member forming step, the frame-shaped member forming step, the metal connector forming step, and the engaging step are substantially the same as those in the manufacturing method of the reinforcing bar truss with the metal connector, and therefore, the description thereof will be omitted, and the fixing step and the welding step will be described.
As shown in fig. 1 to 3, the corrugated board 1 is fixed such that the bottom plate portion 40 and the steel bar truss with metal connectors 4 are integrated. The bottom plate portion 40 uses a plate member made of metal. For example, hot-dip galvanized steel sheet may be used. A projecting portion 41 is formed on the surface of the bottom plate portion 40 so as to match the installation position of the metal-link-equipped steel truss 4. Specifically, the bottom plate 40 is projected upward in the thickness direction thereof in a convex shape, and linearly extends in the longitudinal direction of the bottom plate 40, thereby forming the protruding portion 41. The positions of the protruding portions 41 are set so as to match the positions of the trough portions 32 of the lattice 30 to which the steel trusses 2 are fixed. The cross-sectional shape of the protruding strip 41 is processed into a semicircular shape. The size of the bottom plate portion 40 can be arbitrarily set according to the area of the concrete floor. The width of the bottom plate portion 40 is set in accordance with the arrangement interval of the metal-link-equipped steel bar trusses 4, that is, the interval L5 of the upper main tendons 10 (see fig. 6).
Next, the metal-link-equipped steel bar trusses 4 are arranged on the bottom plate portion 40. The corrugated board 1 of the present embodiment is configured such that two steel trusses 4 with metal connectors are provided in parallel on one bottom plate portion 40 to form a set of corrugated boards 1. In addition, the number of the metal-link-equipped steel trusses 4 provided on the bottom plate portion 40 can be arbitrarily set. For example, three steel trusses 4 with metal connectors may be arranged in parallel to form a set of corrugated boards 1. A plurality of corrugated boards 1 may be spread in a row according to the size of the floor. When the corrugated sheets 1 are arranged in the width direction, the end edge portions of the adjacent bottom plate portions 40 are engaged with each other. For example, the folded pieces that engage with each other may be formed by bending the end edge portion of the bottom plate portion 40 in the longitudinal direction.
< fixing Process >
In the fixing step, the trough portions 32 of the lattice material 30 of the steel-bar truss 2 are welded to the protruding strip portions 41 of the bottom plate portion 40. In the present embodiment, as shown in fig. 37, the leg portion 37 formed on the valley portion 32 side of the inclined portion 38 is fixed at a portion abutting against the ridge portion 41. The portion where the leg portion 37 is joined to the ridge portion 41 serves as a fixing portion 39.
< welding Process >
In the welding process, the metal connector 3 and the bottom plate portion 40 are joined by welding. The expanded portion 72 of the frame member 70 of the metal connector 3 has both ends of the second linear portion 71 expanded outward while extending downward, and is in contact with the protruding strip portion 41 of the bottom plate portion 40. The portion of the expanded portion 72 that abuts the protruding portion 41 is set as a welding portion 73 and welded.
The metal-link-equipped steel truss 4 is arranged on the protruding portion 41 of the bottom plate portion 40 such that the leg portion 37 of the lattice material 30 and the lower end of the expanded portion 72 of the frame-shaped member 70 are linearly arranged. Thus, the welding in the welding step and the welding in the fixing step are performed by the welding apparatus 6 in the same production line step. As shown in fig. 37 (a) to (c), in the longitudinal direction of the steel truss 2, the bottom plate portion 40 on which the steel truss with metallic coupling 4 is disposed is gradually conveyed to the welding device 6 by a predetermined length, and the portions (fixing portion 39, welding portion 73) that are in contact with the protruding bar portion 41 are welded. Further, since the wire of the same diameter and the same material is used for the lattice 30 and the frame member 70, the welding conditions of the fixing portion 39 and the welding portion 73 can be unified.
In the fixing step and the welding step, spot welding is used, but other welding methods may be used. For example, the leg portion 37 of the steel bar truss 2 and the expanded portion 72 of the metal connector 3 may be joined to the protruding strip portion 41 of the bottom plate portion 40 by projection welding.
In the present embodiment, the engaging step is preferably performed before the fixing step. That is, after the engaging step of attaching the metal connector 3 to the steel truss 2, the steel truss 4 with the metal connector is joined to the bottom plate portion 40 in the fixing step and the welding step, thereby forming the corrugated board 1. Thus, the welding operation in the fixing step and the welding step can be performed by a machine in the integrated production line step. In addition, the metal connecting members 3 can be installed by elastically deforming the steel bar trusses 2.
< second embodiment >
Next, a second embodiment will be explained. The steel bar truss with the metal connecting member and the manufacturing method thereof, and the structure of the steel bar truss, the steel bar truss forming process, the support member forming process, and the frame-shaped member forming process in the corrugated board and the manufacturing method thereof have substantially the same structure, operational effects, and the like as those of the first embodiment. Therefore, the same reference numerals are given to substantially the same portions, and the description thereof is omitted, and the following detailed description is given of different portions.
< Structure of Metal connecting Member >
As shown in fig. 12 to 16, the metal connector 203 is coupled to an end of the corrugated board 1 erected on the main beam 5 of the building. A steel bar truss 2 is attached to the surface of the bottom plate 40 of the corrugated board 1, and the metal connector 203 is engaged with the lower main bar 20 of the steel bar truss 2. The metal connector 203 includes a support member 50, a fastening member 60, and a frame-like member 70, wherein the fastening member 60 is engaged with the lower main rib 20 of the steel bar truss 2, the frame-like member 70 is welded to the bottom plate portion 40, and the support member 50 is joined to the main body beam 5.
The support member 50 is formed by bending a linear material made of metal, for example, a round steel bar, into an L shape, and includes a first rod portion 51 and a second rod portion 52, as in the first embodiment. The linear material may be a deformed steel bar. The first rod-like portion 51 extends in the plate surface direction of the bottom plate portion 40 of the corrugated board 1, and an end portion 53 thereof projects outward from an end portion of the bottom plate portion 40. That is, the length of the first rod-like portion 51 is set so as to protrude outward by a predetermined amount from the end of the bottom plate 40.
The second rod-shaped portion 52 of the support member 50 is configured such that one end of the first rod-shaped portion 51 is bent at an arbitrarily set bending point 55 and extends upward. The height H of the second bar-shaped part 52 is set between the height H1 on the lower surface side of the upper main rib 10 and the height H2 on the upper surface side of the lower main rib 20 of the steel bar truss 2, based on the plate surface of the bottom plate part 40. That is, the second bar-shaped portion 52 is configured not to extend to the height position of the upper bead 10. Thus, the support member 50 can be disposed in a state where the second rod-shaped portion 52 is positioned directly below the upper bead 10.
The fastening member 60 has a first linear portion 61, and engaging portions 62 are provided at both ends of the first linear portion 61. The engaging portions 62 are configured to maintain a state of engagement with the lower main bead 20. The fastening member 60 is configured such that the first linear portion 61 contacts the lower surface side of the lower bead 20, and the engaging portion 62 engages in a state of being wrapped around the outer peripheral surface of the lower bead 20. That is, the first linear portion 61 is joined to the second rod-like portion 52 in a state where the engaging portions 62 at both ends thereof are bent upward.
The fastening member 60 is formed by bending a linear material made of metal, as in the first embodiment. For example, a wire coil may also be used. The fastening member 60 is made of the same material and has the same diameter as the lattice member 30 of the steel truss 2 to be connected. The length of the first linear portion 61 is set according to the interval of the 2 lower main tendons 20 of the steel bar truss 2. The engaging portion 62 is formed by being curved with a curvature corresponding to the diameter of the lower bead 20. In the present embodiment, both ends of the first linear portion 61 are curved so as to follow the outer peripheral surface of the lower main bead 20, and the engaging portion 62 is formed. The engaging portion 62 may engage in a state of being wrapped around the upper surface side of the lower bead 20 as shown in fig. 12, or may engage in a state of being wrapped around a part of the outer peripheral surface of the lower bead 20 as shown in fig. 13. By reducing the amount of wrapping of the engaging portion 62, the metal connector 203 is configured to be easily engaged from below the lower bead 20.
The frame member 70 has a second linear portion 71 and an expanding portion 72 that expands both ends of the second linear portion 71 outward. The second linear portion 71 abuts against the lower surface side of the 2 lower main beads 20. The expanding portion 72 extends from both ends of the second linear portion 71 toward the plate surface of the bottom plate portion 40, and expands laterally so that the lower ends are separated from each other to abut against the plate surface of the bottom plate portion 40. The expanded portion 72 is expanded outward in the longitudinal direction of the second linear portion 71. Specifically, both ends of the second linear portion 71 extend downward, are bent at positions corresponding to the height of the protruding portions 41 on the plate surface of the bottom plate portion 40, and extend to the protruding portions 41 along the plate surface direction of the bottom plate portion 40. In addition, the expanded portion 72 can be engaged with the protruding strip portion 41.
The frame-shaped member 70 is formed by bending a linear material made of metal into a convex shape, as in the first embodiment. For example, a wire coil may also be used. The frame member 70 is formed of the same material and the same diameter as the lattice member 30 of the steel truss 2 to be connected.
In the metal connector 203, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 intersect with the second rod-shaped portion 52 of the support member 50, respectively, and are joined to face each other so as to sandwich the second rod-shaped portion 52 from both sides in the radial direction of the second rod-shaped portion 52 with respect to the second rod-shaped portion 52. Further, the middle portion in the longitudinal direction of the first linear portion 61 and the middle portion in the longitudinal direction of the second rod-shaped portion 52 are joined so as to be in contact with each other, and the middle portion in the longitudinal direction of the second linear portion 71 and the middle portion in the longitudinal direction of the second rod-shaped portion 52 are joined so as to be in contact with each other. The first linear portion 61 and the second linear portion 71 are configured to intersect the direction in which the first rod-like portion 51 extends.
The metal connector 203 has a structure in which the frame-shaped member 70 is disposed adjacent to the inclined portion 38 of the lattice 30 connecting the peak portion 31 and the trough portion 32 in the longitudinal direction of the steel truss 2, and is attached to the steel truss 2. In other words, as shown in fig. 15 and 16, the metal connector 203 is configured to be attached in a state where the second linear portion 71 of the frame-like member 70 is positioned closer to the inclined portion 38 than the first linear portion 61 of the opposed fastening member 60.
Structure of steel bar truss with metal connecting piece
The metal-link-equipped steel truss 4 is configured by engaging and attaching the metal link 203 to the steel truss 2. Further, the metal connector 203 is attached to any one of the steel trusses 2 of the mountain-cut steel truss 2 in which the lattice 30 is cut at the mountain portion 31 and the valley-cut steel truss 2 in which the lattice 30 is cut at the valley portion 32, as in the first embodiment. The first rod-shaped portion 51 of the support member 50 is configured such that an end portion 53 extends outward from an end portion of the bottom plate portion 40.
Fig. 12 and 15 are views showing an example of a state in which the metal connector 203 is attached to the mountain-cut steel bar truss 2. In the metal connector 203, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70, which are opposed to each other, abut on the lower surface side of the lower main rib 20 of the steel-bar truss 2, and the engaging portions 62 at both ends of the first linear portion 61 engage with the lower main rib 20 in a state of being wrapped around the upper surface side of the lower main rib 20. The frame-shaped member 70 is configured such that the expanded portions 72 extend downward from both ends of the second linear portion 71.
In the metal connector 203, the fastening member 60 and the frame member 70 are located on the end side of the inclined portion 38 of the end portion of the lattice material 30 that connects the peak portion 31 and the trough portion 32 in the longitudinal direction of the steel-bar truss 2. Specifically, as shown in fig. 15, in the reinforcement truss 2 cut at a mountain, the first linear portion 61 of the fastening member 60 is positioned on the end side of the lower inclined portion 38D. Further, the second straight portion 71 of the frame member 70 is disposed adjacent to the lower inclined portion 38D. In this way, the second linear portion 71 is positioned closer to the inclined portion 38 than the opposing first linear portion 61, and thereby the expanded portion 72 is configured to be disposed closer to the leg portion 37 of the end portion of the steel-bar truss 2.
Fig. 13 and 16 are views showing an example of a state in which the metal connector 203 is attached to the valley-cut steel bar truss 2. The metal link 203 may be configured such that the fastening member 60 and the frame member 70 are attached to the end of the lattice member 30 at a position closer to the center than the inclined portion 38 connecting the peak portion 31 and the trough portion 32 in the longitudinal direction of the steel-bar truss 2. Specifically, as shown in fig. 16, in the valley-cut steel bar truss 2, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 are positioned on the center side of the upper inclined portion 38U. Further, the second linear portion 71 of the frame member 70 is disposed adjacent to the upper inclined portion 38U. The metal connector 203 is engaged with the engaging portion 62 of the fastening member 60 in a state of surrounding a part of the outer peripheral surface of the lower bead 20. By reducing the amount of wrapping of the engaging portion 62 in this way, the metal connector 203 is configured to be easily engaged from below the lower bead 20. Therefore, the metal connector 203 is easily attached to the center side of the upper inclined portion 38U of the steel truss 2.
The metal connector 203 can be attached to any position of the end of the steel truss 2, depending on the installation position of the corrugated plate 1 erected on the main body beam 5, the cutting position of the lattice material 30 of the steel truss 2, and the like.
< Structure of corrugated board >
The corrugated board 1 has a metal bottom plate 40, and a plurality of steel trusses 2 are arranged in parallel at predetermined intervals and integrally fixed to the plate surface of the bottom plate 40, as in the first embodiment. In addition, a metal connector 3 is attached to the steel truss 2. Specifically, two steel trusses 4 with metal connectors are now juxtaposed on one floor 40. The structure of the bottom plate portion 40 is substantially the same as that of the first embodiment, and therefore, the description thereof is omitted.
The valley portions 32 of the lattice material 30 are joined to the protruding portions 41 of the bottom plate portion 40. Specifically, the leg portions 37 formed on the valley portion 32 side of the inclined portion 38 of the lattice material 30 are joined by welding to the fixing portions 39 which are portions in contact with the ridge portions 41. Further, the expanded portion 72 of the frame-shaped member 70 of the metal connector 203 is joined to the welding portion 73 which is a portion in contact with the protruding portion 41. The second linear portion 71 of the frame-shaped member 70 abuts against the lower surface side of the lower main rib 20 of the steel-bar truss 2. Thereby, the frame-like member 70 is fixed between the lower main bead 20 and the bottom plate portion 40.
Next, a process of manufacturing the metal connector 203 will be described. The metal connector 203 is formed by joining the fastening member 60 and the frame member 70 to the support member 50, as in the first embodiment. The support member forming step and the frame member forming step are substantially the same as those in the first embodiment, and therefore, description thereof is omitted.
< Molding Process of fastening Member >
In the fastening member forming step, the fastening member 60 is formed by bending a linear material made of metal, as in the first embodiment. For example, a wire coil may also be used. The fastening member 60 has a first linear portion 61 and an engaging portion 62, the first linear portion 61 intersects and is joined to the second rod-shaped portion 52 of the support member 50, and the engaging portion 62 maintains a state of being engaged with the lower main bar 20 of the steel-bar truss 2 at both ends of the first linear portion 61. Specifically, the engaging portion 62 is formed by bending both ends of the first straight portion 61 made of a linear wire in a curved shape with a curvature corresponding to the diameter of the lower main bead 20. In other words, the lower main bead 20 is curved along the outer peripheral surface thereof. The length of the first linear portion 61 is set according to the interval of the 2 lower main beads 20.
As shown in fig. 12, the fastening member 60 may be configured to be engaged in a state where the engaging portion 62 is wrapped around the upper surface side of the lower bead 20. Thereby, the metal connector 203 is difficult to be detached from the steel-bar truss 2. As shown in fig. 13, the engaging portion 62 may be engaged with a portion of the outer peripheral surface of the lower bead 20. This facilitates engagement of the metal connector 203 at any position of the steel-bar truss 2. The fastening member 60 may be formed of the same material and the same diameter as the lattice member 30 of the steel-bar truss 2.
< Metal connecting Member Forming Process
In the metal joint forming process, the fastening member 60 and the frame-like member 70 are joined to the support member 50, respectively. Specifically, the first linear portion 61 of the fastening member 60, the second linear portion 71 of the frame-shaped member 70, and the second rod-shaped portion 52 of the support member 50 intersect and are joined to each other. The first linear portion 61 and the second linear portion 71 are opposed to each other with respect to the second rod-shaped portion 52 so as to sandwich the second rod-shaped portion 52 from both sides in the radial direction of the second rod-shaped portion 52, and are parallel to each other. The first linear portion 61 and the second linear portion 71 are joined to each other in a state of intersecting the direction in which the first rod-like portion 51 extends.
As shown in fig. 12 to 16, the metal connector 203 is configured to be engaged and attached in a state where the first linear portion 61 of the fastening member 60 is in contact with the lower surface side of the lower main bead 20. That is, the first linear portion 61 is joined to the second rod-like portion 52 in a state where the engaging portion 62 is bent upward from both ends thereof. The fastening member 60 and the support member 50 are joined by welding at a position where the longitudinal middle portion of the first linear portion 61 and the longitudinal middle portion of the second rod-like portion 52 are in contact with each other.
The metal connector 203 is attached in a state where the second linear portion 71 of the frame-like member 70 is in contact with the lower surfaces of the 2 lower main beads 20. That is, both ends of the second linear portion 71 are in contact with the lower surface side of the lower main rib 20, respectively, and the expanded portion 72 is joined to the second rod-shaped portion 52 in a state of being bent downward from both ends of the second linear portion 71 and expanded outward. Further, the frame-shaped member 70 and the support member 50 are joined by welding at a position where the longitudinal intermediate portion of the second linear portion 71 and the longitudinal intermediate portion of the second rod-shaped portion 52 are in contact with each other.
The method for manufacturing the steel bar truss with the metal connecting member does not need to follow the order of the steel bar truss forming process, the support member forming process, the fastening member forming process, the frame-shaped member forming process, and the metal connecting member forming process, and can be performed before the engaging process.
< engaging step >
Next, the engaging step will be explained. In the engagement step, the metal connector 203 is engaged with the steel bar truss 2. Specifically, the engaging portion 62 of the fastening member 60 is engaged in the longitudinal direction of the steel truss 2 so as to slide from the end portion side of the lower main rib 20. In the metal link 203, the fastening member 60 and the frame-shaped member 70 are positioned on the end side of the inclined portion 38 of the end portion of the lattice material 30 that connects the peak portion 31 and the trough portion 32 in the longitudinal direction of the steel-bar truss 2. Further, the frame-shaped member 70 is preferably attached so as to be disposed adjacent to the inclined portion 38 of the lattice material 30. The first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame member 70 are in contact with the lower surface side of the lower main rib 20.
The metal-link-equipped steel truss 4 may be configured such that the fastening member 60 and the frame-like member 70 of the metal link 203 are positioned on the center side of the inclined portion 38 of the end of the lattice material 30 in the longitudinal direction of the steel truss 2. Further, the metal connector 203 may be attached from below the lower main bead 20. Further, the metal coupler 203 may be engaged with the steel truss 2 by elastically deforming the steel truss 2 and attaching the metal coupler 203 so that the 2 lower main tendons 20 of the steel truss 2 are close to each other (see fig. 36).
Method for producing corrugated board
The corrugated board 1 is manufactured through a steel bar truss forming process, a support member forming process, a fastening member forming process, a frame-shaped member forming process, a metal connecting member forming process, a clamping process, a fixing process and a welding process.
The steel bar truss forming step, the support member forming step, the fastening member forming step, the frame-shaped member forming step, the metal connector forming step, and the engaging step are substantially the same as those of the method for manufacturing the steel bar truss with the metal connector according to the second embodiment. In addition, the fixing step and the welding step are performed by the same method as in the first embodiment shown in fig. 37.
< third embodiment >
Next, a third embodiment will be explained. The steel bar truss with the metal connecting member, the manufacturing method thereof, the structure of the steel bar truss in the manufacturing method of the corrugated board, the steel bar truss forming process, and the support member forming process have substantially the same structure, operational effects, and the like as those of the first embodiment. Therefore, the same reference numerals are given to substantially the same portions, and the description thereof is omitted, and the following detailed description is given of different portions.
< Structure of Metal connecting Member >
As shown in fig. 17 and 18, the metal connector 303 is coupled to an end of the corrugated board 1 erected on the main beam 5 of the building. A steel bar truss 2 is attached to the surface of the bottom plate 40 of the corrugated board 1, and the lower main bar 20 of the steel bar truss 2 extends so as to be positioned above the bottom plate 40. The metal connector 303 includes a support member 50 and a fastening member 60, the fastening member 60 is engaged with the lower main rib 20 of the steel bar truss 2, and the support member 50 is engaged with the body girder 5.
The support member 50 is formed by bending a linear metal material into an L shape, and includes a first rod portion 51 and a second rod portion 52, as in the metal connector 3 of the first embodiment. The first bar-like portion 51 extends in the plate surface direction of the bottom plate portion 40 of the corrugated board 1, and an end portion 53 thereof projects outward from an end portion of the bottom plate portion 40. That is, the length of the first rod-like portion 51 is set so as to protrude outward by a predetermined amount from the end of the bottom plate 40. The second rod-shaped portion 52 is configured such that one end of the first rod-shaped portion 51 is bent at an arbitrarily set bending point 55 and extends upward. The height of the second rod-shaped portion 52 is set in the same manner as in the first embodiment. For example, a round bar or a deformed bar may be used as the linear material.
Referring to fig. 17, 18, and 21 to 27, the fastening member 60 includes 2 first linear portions 61a and 61b, and includes engaging portions 62 and guides 63 at both ends of the first linear portions 61a and 61b, respectively. The 2 first linear portions 61a, 61b intersect the second rod-shaped portion 52 of the support member 50, and are joined to the second rod-shaped portion 52 so as to face each other so as to sandwich the second rod-shaped portion 52 from both sides in the radial direction of the second rod-shaped portion 52. The engaging portion 62 maintains the state of being engaged with the lower main bead 20 of the steel-bar truss 2. The guide 63 guides the outer peripheral surface of the lower bead 20 at the end of the engagement portion 62.
The fastening member 60 is formed by bending a linear material made of metal. For example, a wire coil may also be used. Also, iron wires having the same diameter and the same material as the lattice material 30 of the steel bar truss 2 may be used. The length of the first linear portions 61a and 61b is set according to the interval between the 2 lower main tendons 20 of the steel bar truss 2. The engaging portion 62 is formed by being curved with a curvature corresponding to the diameter of the lower bead 20. In other words, the lower main bead 20 is curved along the outer peripheral surface thereof. The end of the engaging portion 62 is bent in a direction away from the first linear portions 61a and 61b, and the guide 63 is molded. That is, the ends of the first linear portions 61a and 61b are bent so that the engaging portions 62 and the guides 63 are connected in an S-shape.
The fastening member 60 is configured to be attached by being engaged with the first linear portions 61a and 61b in a state of being in contact with the lower surface side of the lower main bead 20. That is, the first linear portions 61a and 61b are joined to the second rod-like portion 52 in a state where the engaging portions 62 and the guide 63 are bent upward from both ends thereof. Further, the first linear portions 61a and 61b are joined so that the longitudinal intermediate portions thereof are in contact with the longitudinal intermediate portion of the second rod-like portion 52.
Structure of steel bar truss with metal connecting piece
As shown in fig. 17 and 18, the metal-link-equipped steel truss 4 is configured by engaging the metal link 303 with the steel truss 2. Referring to fig. 20, the engaging portion 62 of the fastening member 60 of the metal connector 303 engages with the lower main bar 20 of the steel bar truss 2. The first linear portions 61a and 61b of the fastening member 60 are located at positions in contact with the lower surface side of the lower main bead 20. Referring to fig. 21 to 26, the first rod-shaped portion 51 of the support member 50 is configured such that an end portion 53 protrudes outward from an end portion of the bottom plate portion 40. The metal connector 303 is also attached to any one of the rib trusses 2 that are cut at the peak portions 31 and the valley trusses 2 that are cut at the valley portions 32 and the end portions of the lattice material 30 are cut at the peak portions 31 and the valley portions 32.
The metal link 303 is attached such that the fastening member 60 is positioned on the end side of the inclined portion 38 of the end portion of the lattice material 30, which connects the peak portion 31 and the trough portion 32, in the longitudinal direction of the steel-bar truss 2. Specifically, as shown in fig. 21, in the reinforcement truss 2 cut at a mountain, the first linear portions 61a and 61b of the fastening member 60 are positioned on the end side of the lower inclined portion 38D. As shown in fig. 22, in the valley-cut steel truss 2, the first linear portions 61a and 61b of the fastening member 60 are positioned on the end side of the upper inclined portion 38U. Further, the metal connector 303 can be installed at any position in the end of the steel girder 2 according to the installation position of the corrugated board 1 erected on the main body girder 5.
The metal link 303 may be configured such that the fastening member 60 is attached to the end of the lattice material 30 at a position closer to the center than the inclined portion 38 connecting the peak portion 31 and the trough portion 32 in the longitudinal direction of the steel-bar truss 2. Specifically, as shown in fig. 23, in the reinforcement truss 2 cut at a mountain, the first linear portions 61a and 61b of the fastening member 60 are positioned on the center side of the lower inclined portion 38D. As shown in fig. 24, in the valley-cut steel truss 2, the first linear portions 61a and 61b of the fastening member 60 are positioned on the center side of the upper inclined portion 38U. In this way, by positioning the fastening member 60 closer to the center of the steel truss 2 than the inclined portion 38, the movement of the metal connector 303 toward the end side of the steel truss 2 is locked at the second joint portion 34.
In addition, the metal connector 303 may be configured such that the fastening member 60 is attached such that the inclined portion 38 of the end portion of the lattice material 30, which connects the peak portion 31 and the trough portion 32, is positioned between the opposing first linear portions 61a and 61b in the longitudinal direction of the steel-bar truss 2. Specifically, as shown in fig. 25, in the reinforcement truss 2 cut at the mountain, the opposing first linear portions 61a and 61b are positioned so as to sandwich the lower inclined portion 38D from both sides in the longitudinal direction of the reinforcement truss 2. As shown in fig. 26, in the valley-cut steel bar truss 2, the opposing first linear portions 61a and 61b are positioned so as to sandwich the upper inclined portion 38U from both sides in the longitudinal direction of the steel bar truss 2. By positioning the inclined portion 38 between the first linear portions 61a, 61b of the fastening member 60 in this way, the metal connector 303 is locked to the inclined portion 38 of the lattice 30 and the lower bead 20 at the second joining portion 34.
< Structure of corrugated board >
The corrugated board 1 of the third embodiment has a bottom plate portion 40 made of metal. The structure of the bottom plate portion 40 is substantially the same as that of the first embodiment, and therefore, description thereof is omitted. As shown in fig. 17 and 18, in the corrugated board 1, a plurality of steel trusses 2 are arranged in parallel at a predetermined interval and integrally fixed to the board surface of the bottom plate portion 40. Specifically, the leg portions 37 of the lattice 30 of the steel-bar truss 2 are joined and fixed to the respective protruding portions 41 formed on the plate surface of the bottom plate portion 40. In addition, a metal connector 303 is attached to the steel bar truss 2. As in the first embodiment, the number of the metal-link-equipped steel trusses 4 provided on the floor portion 40 can be arbitrarily set.
Method for manufacturing steel bar truss with metal connecting piece and method for manufacturing corrugated plate
The steel truss with metal joint 4 of the third embodiment is manufactured through a steel truss forming process, a support member forming process, a fastening member forming process, a metal joint forming process, an engaging process, and a fixing process.
< Molding Process of fastening Member >
In the fastening member forming step, the fastening member 60 is formed by bending a linear material made of metal. For example, a wire coil may also be used. As shown in fig. 19 and 35, each of the fastening members 60 includes 2 first linear portions 61(61a, 61b) and engaging portions 62 formed at both ends of the first linear portions 61a, 61 b. The first linear portions 61a and 61b intersect and are joined to the second rod-shaped portion 52 of the support member 50. The engaging portion 62 maintains the state of being engaged with the lower main bead 20 of the steel-bar truss 2. Specifically, the engaging portion 62 is formed by bending both ends of 2 first linear portions 61a and 61b made of linear iron wires into a curved shape with a curvature corresponding to the size of the diameter of the lower main bead 20. In other words, the lower main bead 20 is curved along the outer peripheral surface thereof. The lengths of the first linear portions 61a and 61b are set according to the interval between the 2 lower main tendons 20 of the steel bar truss 2 (see fig. 20).
The end of the engaging portion 62 of the fastening member 60 is bent in a direction away from the first linear portions 61a and 61b, and a guide 63 that guides the outer peripheral surface of the lower bead 20 is formed. That is, the ends of the first linear portions 61a and 61b are bent so that the engaging portions 62 and the guides 63 are connected in an S-shape.
< Metal connecting Member Forming Process
In the metal joint forming process, the support member 50 and the fastening member 60 are joined to form the metal joint 303. In the fastening member 60, 2 first linear portions 61a and 61b intersect and are joined to the second rod-shaped portion 52 of the support member 50. The first linear portions 61a and 61b are joined to the second rod-shaped portion 52 so as to face each other so as to sandwich the second rod-shaped portion 52 from both sides in the radial direction of the second rod-shaped portion 52.
The fastening member 60 is configured to be attached so as to engage with the first linear portions 61a and 61b in a state of being in contact with the lower surface side of the lower main bead 20. That is, the first linear portions 61a and 61b are joined to the second rod-like portion 52 in a state where the engaging portions 62 and the guide 63 are bent upward from both ends thereof. In the present embodiment, the first straight portions 61a and 61b are joined by welding at positions where the longitudinal intermediate portions thereof contact the longitudinal intermediate portions of the second rod-like portions 52.
The method for manufacturing the steel bar truss with the metal connecting piece does not need to follow the sequence of the steel bar truss forming process, the supporting member forming process, the fastening member forming process and the metal connecting piece forming process, and can be performed before the clamping process.
< engaging step >
Next, the engaging step will be explained. In the engagement step, the metal connector 303 is engaged with the steel bar truss 2. Specifically, the engaging portion 62 of the fastening member 60 is brought into contact with the lower main bead 20 so as to surround the lower main bead 20 from below the lower main bead 20 at the end of the steel-bar truss 2. In the fastening member 60, the engaging portion 62 and the guide 63 are bent upward of the first linear portions 61a and 61b, so that the first linear portions 61a and 61b intersect the lower main bead 20 and are engaged with the outer peripheral lower surface side of the lower main bead 20 in abutment. Through this engagement process, the steel bar truss 4 with the metal connecting member is obtained.
The metal connector 3 can be attached to any position of the end of the steel truss 2, depending on the installation position of the corrugated plate 1 erected on the main body beam 5, the cutting position of the lattice material 30 of the steel truss 2, and the like. As shown in fig. 36, in the engagement step, the metal coupler 3 may be engaged with the steel truss 2 by elastically deforming the steel truss 2 so that the 2 lower main tendons 20 of the steel truss 2 approach each other and then attaching the metal coupler 3.
The corrugated board 1 is manufactured through a steel bar truss forming process, a support member forming process, a fastening member forming process, a metal connector forming process, a clamping process, and a fixing process. The process of manufacturing the bottom plate 40 of the corrugated board 1 and the method of arranging the reinforcing bar trusses 2 are substantially the same as those of the first embodiment, and therefore, the description thereof is omitted.
< fixing Process >
In the fixing step, the valley portions 32 of the lattice material 30 of the steel-bar truss 2 are joined to the protruding strip portions 41 of the bottom plate portion 40 by welding. In the present embodiment, the leg portion 37 formed on the valley portion 32 side of the inclined portion 38 is fixed to the protruding portion 41. In this way, the metal-link-equipped steel bar truss 4 is joined to the bottom plate 40 to form the corrugated board 1 as a single body.
In the present embodiment, the engaging step is preferably performed before the fixing step. That is, after the engaging step of attaching the metal connector 303 to the steel truss 2, the steel truss 4 with the metal connector is fixed to the bottom plate portion 40 in the fixing step, and the corrugated board 1 is manufactured. Thus, the metal connector 303 can be attached from below the lower main bar 20 of the steel-bar truss 2 in the engagement step. Further, the metal connecting member 303 can be attached by elastically deforming the steel bar truss 2 (see fig. 36).
< fourth embodiment >
Next, a fourth embodiment will be explained. The steel bar truss with the metal connecting member and the manufacturing method thereof, the corrugated board and the structure of the steel bar truss in the manufacturing method thereof, and the steel bar truss molding process have substantially the same structure and operational effects as those of the first embodiment. The fastening member forming step, the structure of the support member, and the support member forming step have substantially the same structures and operational effects as those of the third embodiment. Therefore, the same reference numerals are given to substantially the same portions, and the description thereof is omitted, and different portions will be described in detail below.
Structure of metal connecting piece and steel bar truss with metal connecting piece
As shown in fig. 28 to 30, in the metal connector 403, the inclined portion 38 of the fastening member 60 is positioned between the first linear portions 61a and 61b facing each other in the longitudinal direction of the steel-bar truss 2. The engaging portion 62 and the guide 63 of the fastening member 60 are configured to be inclined toward the end side or the center side in the longitudinal direction of the steel truss 2. Specifically, in the longitudinal direction of the steel truss 2, the portions from the engaging portion 62 to the end of the guide 63 of the opposite ends of the first linear portions 61a and 61b are inclined so as to be apart from each other. Thus, the metal coupler 403 can be attached to the steel truss 2 without interference between the fastening member 60 and the inclined portion 38.
Method for manufacturing steel bar truss with metal connecting piece and method for manufacturing corrugated plate
In the metal coupler molding step, the engaging portions 62 and the guides 63 of the fastening members 60 are inclined toward the end sides or the center sides in the longitudinal direction of the steel bar truss 2. That is, the fastening member 60 is engaged with the support member 50 in the following state: in the longitudinal direction of the steel truss 2, portions from the engaging portion 62 to the end of the guide 63 at both ends of the first linear portions 61a and 61b facing each other are inclined so as to be apart from each other.
In the engagement step, the metal connector 403 is engaged with the steel bar truss 2. Specifically, the engaging portion 62 of the fastening member 60 is brought into contact with the lower main bead 20 so as to surround the lower main bead 20 from below the lower main bead 20 at the end of the steel-bar truss 2. In the fastening member 60, the engaging portion 62 and the guide 63 are bent obliquely upward from the first linear portions 61a and 61b, and the first linear portions 61a and 61b intersect the lower main bead 20 and are engaged so as to abut against the outer peripheral lower surface side of the lower main bead 20. Further, the metal connector 403 can be installed at any position in the end of the steel-bar truss 2.
The engaging step is preferably performed before the fixing step. That is, after the engaging step of attaching the metal connector 403 to the steel truss 2, the steel truss 4 with the metal connector is fixed to the bottom plate portion 40 in the fixing step, thereby forming the corrugated board 1. Thereby, the metal connector 403 can be attached from below the lower main bar 20 of the steel-bar truss 2 in the engaging step. Further, the metal link 403 can be attached by elastically deforming the steel truss 2 (see fig. 36).
< fifth embodiment >
Next, a fifth embodiment will be explained. The steel bar truss with the metal connecting member and the manufacturing method thereof, the corrugated board and the structure of the steel bar truss in the manufacturing method thereof, and the steel bar truss molding process have substantially the same structure and operational effects as those of the first embodiment. The fastening member forming step, the support member, and the support member forming step have substantially the same configurations and operational effects as those of the third embodiment. Therefore, the same reference numerals are given to substantially the same portions, and the description thereof is omitted, and different portions will be described in detail below.
Structure of metal connecting piece and steel bar truss with metal connecting piece
As shown in fig. 31 to 33, the metal connector 503 may be mounted so as to be engaged with the first linear portions 61a and 61b of the fastening member 60 in contact with the upper surface side of the lower bead 20. That is, the first linear portions 61a and 61b may be joined to the second rod-like portion 52 in a state where the engaging portion 62 and the guide 63 are bent downward. With this structure, the metal connector 503 can be attached from above the lower bead 20.
Method for manufacturing steel bar truss with metal connecting piece and method for manufacturing corrugated plate
In the metal joint forming step, the metal joint 503 may be mounted so as to be engaged with the first linear portions 61a and 61b of the fastening member 60 in contact with the upper surface side of the lower bead 20. That is, the first linear portions 61a and 61b are joined to the second rod-like portion 52 in a state where the engaging portion 62 and the guide 63 are bent downward.
In the engagement step, the metal connector 503 is engaged with the steel bar truss 2. Specifically, the engaging portion 62 of the fastening member 60 is brought into contact so as to wrap the lower main link 20 from above the lower main link 20 at the end of the steel-bar truss 2. In the fastening member 60, the engaging portion 62 and the guide 63 are bent downward from the first linear portions 61a and 61b, and the first linear portions 61a and 61b intersect the lower main bead 20 and are engaged so as to be in contact with the outer peripheral upper surface side of the lower main bead 20.
In the step of manufacturing the corrugated board 1, the fastening step may be performed after the fixing step. That is, even after the reinforcing-bar truss 2 is fixed to the bottom plate portion 40, the metal connecting member 503 can be attached to the reinforcing-bar truss 2 from above the lower main rib 20.
Next, the common functions of the steel bar truss, the metal connecting member, the steel bar truss with the metal connecting member, the manufacturing method thereof, and the corrugated board and the manufacturing method thereof according to the first to fifth embodiments will be described. Further, for the metal connecting member, the reference numeral of the first embodiment is used as a representative.
< role of steel bar truss >
The steel bar truss 2 is configured such that the pair of lattice members 30a and 30b are disposed so as to sandwich the upper main bar 10 from both sides in the width direction. This enables the upper main bead 10 to be supported from both sides in the width direction, and the upper main bead 10 to be held evenly from the left and right. The pair of lattice members 30a and 30b are arranged to expand outward so as to have expanded portions. This enables the steel truss 2 to be supported in a wider area, and the right and left inclination of the steel truss 2 to be suppressed. Therefore, even when concrete is poured, the upper and lower main beads 10 and 20 are easily maintained in a parallel state. Further, deformation of the structural member can be suppressed.
Referring to fig. 6 to 9, since the respective ridge portions 31a of one lattice 30a and the respective ridge portions 31b of the other lattice 30b are configured to face each other, the ridge portions 31a and 31b overlap each other when viewed in the width direction of the pair of lattices 30. Further, when viewed in the width direction, the first joining portions 33a of one lattice 30a and the first joining portions 33b of the other lattice 30b overlap each other. Therefore, the welding operation of the upper main bead 10 and the pair of lattice members 30a and 30b can be performed at one time at the first joining portions 33a and 33b, and the number of welding points can be reduced.
Further, the lattice materials 30a and 30b are joined so as to sandwich the upper bead 10 from both sides in the width direction, and are arranged so as not to straddle the upper bead 10 and the lower bead 20, so that the degree of freedom is increased when selecting the diameters of the upper bead 10, the lower bead 20, and the lattice material 30.
Further, the lattice material 30 has an outwardly expanded structure, and thus can support the steel bar truss 2 in a wider area. Further, the leg 37 is provided on the valley portion 32 side of the inclined portion 38, so that the reinforcing bar truss 2 can be supported by the leg 37. Therefore, the steel-bar truss 2 can stably stand alone, and the rigidity is improved. Further, when the steel-bar truss 2 is joined to the bottom plate portion 40, the area of the steel-bar truss 2 in contact with the bottom plate portion 40 increases, and therefore, the rigidity and stability of the steel-bar truss 2 can be improved.
The lattice material 30 has a structure in which the peak portions 31 and the valley portions 32 are repeated at the same amplitude and the same pitch. Therefore, the upper bead 10 is held in a linear shape by joining the upper bead 10 to the top of each of the ridge portions 31 of the lattice 30. In other words, in the lattice material 30, the first joining locations 33 are set so as to be arranged in a straight line. Further, the second joining portions 34 are set so as to be aligned in a straight line by arranging the lower beads 20 in parallel along the upper beads 10. Further, since the amplitude and the pitch are fixed, the bending work of the lattice material 30 and the joining work with the main bar can be efficiently performed.
The steel bar truss 2 may have a mountain-cut structure in which the end of the lattice 30 is cut at the mountain portion 31, or may have a valley-cut structure in which the end of the lattice 30 is cut at the valley portion 32. Therefore, the degree of freedom is further increased when the lengths of the steel trusses 2 and the corrugated boards 1 are set.
< role of Metal connecting Member, Steel truss with Metal connecting Member, corrugated sheet >
In the metal connector 3, the engaging portion 62 of the fastening member 60 is engaged with the lower main rib 20 of the steel truss 2, whereby the metal connector 3 can be attached to the steel truss 2 without welding. In addition, the metal link 3 is less likely to be separated from the lower main reinforcement 20, and the strength of fixing the metal link 3 and the steel bar truss 2 can be maintained. Further, the first rod-like portions 51 of the support member 50 are arranged along the plate surface of the bottom plate portion 40 of the corrugated board 1, whereby the metal connector 3 is stably engaged with the steel bar truss 2.
By stably engaging the metal connector 3 with the steel truss 2, the strength and rigidity of the steel truss 4 with the metal connector can be improved. Therefore, the force applied to the upper and lower beads 10 and 20 of the corrugated board 1 erected on the body beam 5 is transmitted to the body beam 5 through the metal connector 3.
The metal connector 3 may be configured such that the fastening member 60 is disposed at a position closer to the center side than the inclined portion 38 of the end portion of the lattice 30 in the longitudinal direction of the steel truss 2, and engages with the lower main rib 20 of the steel truss 2. Thereby, the metal link 3 is locked at the second joint portion 34, and the fastening member 60 is not displaced toward the end side of the steel-bar truss 2 from the inclined portion 38 of the lattice 30. Therefore, the metal connecting member 3 can be suppressed from falling off the steel bar truss 2.
The corrugated board 1 using the valley-cut steel bar truss 2 is configured such that the valley portion 32 of the lattice material 30 of the steel bar truss 2 is located at a position where it is hung on the end of the bottom plate portion 40. Thus, when the corrugated board 1 is erected on the body beam 5, the valley portions 32 of the lattice material 30 are located at positions where they are hung on the body beam 5. Therefore, the force applied to the upper and lower beads 10, 20 is transmitted to the body beam 5 via the lattice material 30.
In addition, in the panel 1 using the valley-cut steel bar truss 2, the second joining portion 34 of the end portion of the lattice material 30 is located at a position closer to the end portion of the bottom plate portion 40 than in the case of using the mountain-cut steel bar truss 2. Therefore, even if the metal link 3 is disposed on the center side of the inclined portion 38U in the case where the fastening member 60 of the metal link 3 is positioned on the center side of the upper inclined portion 38U or in the case where the fastening member 60 sandwiches the upper inclined portion 38U from both sides, the length of the first rod-like portion 51 of the support member 50 does not become too long, and the amount of reinforcing bars to be used can be suppressed.
The size of the bottom plate portion 40 can be set arbitrarily according to the area of the concrete floor. The width of the bottom plate portion 40 can be set according to the number of the steel trusses 2 and the interval therebetween. For example, a set of corrugated boards 1 may be formed by arranging two steel trusses 2 in parallel on the bottom plate 40, and the width of the bottom plate 40 may be set according to the interval L5 between the upper main tendons 10 of the adjacent steel trusses 2 (see fig. 6). Specifically, when a plurality of corrugated boards 1 are arranged in parallel in the width direction, the width of the bottom plate portion 40 can be set so that the intervals L5 of the upper main bead 10 are equal to each other. Thereby, the steel trusses 2 can be arranged at equal intervals.
A plurality of corrugated boards 1 can be arranged in accordance with the size of the floor. The bottom plate sections 40 are configured such that, when a plurality of corrugated boards 1 are arranged in the width direction, the end edge sections of adjacent bottom plate sections 40 engage with each other. Thereby, the corrugated board 1 is fully spread without a gap.
The corrugated board 1 erected on the main body beam 5 is hung on the main body beam 5 in a state where the end 53 side of the first rod-like part 51 of the support member 50 of the metal link 3 protrudes outward by a predetermined length from the end of the bottom plate part 40. The end portion 53 side of the first rod-like portion 51 of the metal link 3 is fixed to the body beam 5 by welding. That is, the corrugated board 1 and the main body girder 5 are connected by the metal connector 3. The metal connector 3 transmits a load applied to the corrugated board 1 to the body girder 5 and supports the corrugated board 1. The corrugated board 1 functions to support the structural material of the concrete floor.
< manufacturing method of steel bar truss with metal connecting member, manufacturing method of corrugated board action >
In the fastening member forming step, the metal coupler 3 is configured such that the engaging portion 62 thereof engages with and abuts against the lower main bead 20 of the steel-bar truss 2. Accordingly, in the engaging step of engaging the metal connector 3 with the steel truss 2, welding is not required, and the work of attaching the metal connector 3 to the steel truss 2 is facilitated.
The steel truss 2 has a pair of lattice members 30 joined to the upper main rib 10 so as to sandwich the upper main rib 10, and the pair of lattice members 30 are expanded outward so as to have expanded portions. Further, lower main beads 20 separated in parallel from each other are joined to the lattice material 30. According to this configuration, the lower main links 20 are urged from the outside in the width direction, and the steel-bar truss 2 is elastically deformed, so that the interval between the 2 lower main links 20 can be temporarily narrowed (see fig. 36). Therefore, the metal connector 3 can be easily attached in the engaging step, and the work efficiency can be improved.
Next, the respective different functions of the metal connector, the steel bar truss with the metal connector, the manufacturing method thereof, and the corrugated board and the manufacturing method thereof according to the first to fifth embodiments will be described.
In the metal connectors 3 and 203 according to the first and second embodiments, the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-like member 70 are joined to face each other with respect to the second rod-like portion 52 of the support member 50 so as to sandwich the second rod-like portion 52 from both sides in the radial direction of the second rod-like portion 52. According to this structure, the support member 50 is supported from both sides by the fastening member 60 and the frame-like member 70 at the joint with the second rod-like portion 52, and the posture can be stabilized. That is, the support member 50 can maintain the posture with the first rod portion 51 horizontal and the second rod portion 52 vertical. Therefore, the strength and stability of the fixing of the metal connecting member 3 and the steel bar truss 2 can be improved.
The metal connectors 3 and 203 according to the first and second embodiments are configured such that the frame-shaped member 70 is expanded outward, and thus the expanded portion 72 abuts against the upper surface of the protruding portion 41 of the bottom plate portion 40. Thus, the welding portion 73, which is the joint portion between the frame-shaped member 70 and the bottom plate portion 40, can be set on the upper surface of the protruding strip portion 41 without being set on the flat surface portion of the bottom plate portion 40.
The metal connectors 3 and 203 according to the first and second embodiments may be configured to be attached such that the fastening member 60 and the frame member 70 are positioned on the center side of the inclined portion 38 at the end of the lattice material 30 in the longitudinal direction of the steel truss 2. Further, the valley portions 32 of the lattice material 30 of the end portions of the valley-cut steel bar trusses 2 are located at the end portions of the bottom plate portion 40 in a hanging manner. Therefore, in the corrugated board 1 erected on the main body beam 5, the leg 37 of the lattice material 30 is hung on the main body beam 5, and the load of the supporting member 50 hung on the metal connecting member 3 can be reduced. Therefore, even when the metal connector 3 is attached to the center side of the inclined portion 38 of the lattice 30 of the steel-bar truss 2, the strength of the corrugated board 1 can be maintained.
In the steel bar truss with metal links 4 of the first and second embodiments, the lattice material 30 of the steel bar truss 2 and the frame-shaped member 70 of the metal link 3 are made of iron wires having the same diameter and the same material. Since the leg portion 37 of the lattice material 30 and the expanded portion 72 of the frame-like member 70 are joined to the upper surface of the same protrusion 41 on the bottom plate portion 40, the joining portions (the fixing portion 39 and the welding portion 73) are linearly arranged. In this way, in the manufacturing process of the corrugated board 1, the fixing process and the welding process can be performed in the same production line, and the condition setting of the welding apparatus can be unified. Therefore, the strength of fixing the corrugated board 1 and the steel bar truss with metal connectors 4 can be maintained.
In the metal connector 3 according to the first embodiment, the first linear portion 61 of the fastening member 60 is engaged with the 2 lower beads 20 so as to be in contact with the upper surface side of the lower bead 20 of the steel-bar truss 2 and so that the engaging portion 62 surrounds the lower surface side of the lower bead 20. Thereby, the fastening member 60 is difficult to be detached from the lower main bead 20. Therefore, the metal coupler 3 is stably engaged with the lower main bar 20 of the steel-bar truss 2. Further, the second linear portion 71 of the frame-shaped member 70 abuts on the upper surface side of the lower main rib 20, and the end of the expanded portion 72 extends to the protruding portion 41 along the surface of the bottom plate portion 40. That is, the expanded portion 72 extends so as to abut on the upper surface of the protruding portion 41, and is welded to the bottom plate portion 40. With this structure, the metal connector 3 is supported by the frame member 70, and strength and stability can be improved. Therefore, the metal connector 3 stably supports the steel bar truss 2 and functions to fix the steel bar truss to the bottom plate portion 40.
In the metal connector 3 according to the first embodiment, the engaging portion 62 of the fastening member 60 is engaged so as to be wrapped around the lower surface side of the lower main bead 20, whereby the metal connector 3 attached to the steel truss 2 can be prevented from being lifted. Accordingly, the strength of the fixation of the metal connecting member 3 and the steel bar truss 2 is improved. In addition, the valley portions 32 of the lattice material 30 at the end portions of the mountain-cut steel bar trusses 2 are located more inward than the end portions of the bottom plate portions 40 than in the case of valley-cutting. Therefore, the leg 37 of the lattice material 30 is not attached to the main body member 5 by being laid on the corrugated board 1 of the main body member 5, and the load is more easily applied to the support member 50 of the metal connector 3. Therefore, the metal connector 3 having the structure in which the engaging portion 62 is wrapped around the lower surface side of the lower main rib 20 has higher strength and rigidity and can function more effectively when mounted on the reinforcement truss 2 having a cut-away shape.
The metal connector 3 according to the first embodiment may be configured such that the engaging portion 62 of the fastening member 60 is adjacent to the lower bead 20 and extends downward from the first straight portion 61. According to this configuration, even between the upper inclined portion 38U and the lower inclined portion 38D of the lattice material 30 of the steel-bar truss 2, the metal connecting member 3 can be easily attached. Therefore, when the metal connector 3 is engaged with the steel truss 2 so that the fastening member 60 and the frame-shaped member 70 are positioned on the center side of the inclined portion 38 of the lattice material 30, the work efficiency of the engaging step can be further improved.
The metal connector 203 according to the second embodiment is engaged with 2 lower main tendons 20 so that the first linear portion 61 of the fastening member 60 abuts against the lower surface side of the lower main tendon 20 of the steel truss 2 and the engaging portion 62 surrounds the outer peripheral surface of the lower main tendon 20. Thereby, the fastening member 60 is difficult to be detached from the lower main bead 20. Therefore, the metal connector 203 is stably engaged with the lower main bar 20 of the steel bar truss 2. The second linear portion 71 of the frame-like member 70 abuts against the lower surface side of the lower main rib 20, and the expanded portion 72 extends on the upper surface of the protruding portion 41 so as to abut against the lower surface side, and is welded to the bottom plate portion 40. According to this structure, the metal connector 203 supports the lower cage bar 20 from below. Accordingly, the metal connector 203 functions to more stably support the load applied to the steel bar truss 2. In addition, the strength and rigidity of the steel bar truss 4 with the metal connecting member can be improved.
The metal connector 203 according to the second embodiment is configured such that the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 are located on the lower surface side of the lower main rib 20. With this configuration, the metal connector 203 attached to the steel-bar truss 2 can be prevented from being lifted. Therefore, the strength of the fixation of the metal connector 203 and the steel bar truss 2 can be improved. In addition, the corrugated board 1 erected on the main body beam 5 can improve the strength and stability of the joint between the support member 50 of the metal connector 203 and the main body beam 5.
The metal connectors 303, 403, and 503 according to the third to fifth embodiments may be configured to engage with the lower main rib 20 of the steel truss 2 such that the inclined portion 38 of the lattice 30 of the steel truss 2 is positioned between the first linear portions 61a and 61b of the fastening member 60. Thereby, the fastening member 60 is positioned to sandwich the inclined portion 38 of the lattice material 30, and the metal connector 3 is fixed at the second joining portion 34. Therefore, the metal connecting member 3 can be suppressed from falling off the steel bar truss 2.
In the metal connectors 303, 403, and 503 according to the third to fifth embodiments, the end portions of the engaging portions 62 of the fastening members 60 are bent in a direction away from the first linear portions 61a and 61b, and the guide 63 is molded. According to this configuration, the guide 63 guides the outer peripheral surface of the lower bead 20, and the engaging portion 62 engages and abuts against the lower bead 20.
In the metal connectors 303, 403, and 503 according to the third to fifth embodiments, the 2 first linear portions 61a and 61b of the fastening member 60 are joined to face each other so as to sandwich the second rod-shaped portion 52 of the support member 50 from both sides in the radial direction of the second rod-shaped portion 52. According to this configuration, the fastening member 60 is supported by sandwiching the support member 50 between the first linear portions 61a and 61b and the joint portion of the second rod-shaped portion 52. In addition, the metal links 303, 403, and 503 have a large number of portions where the fastening members 60 abut against the lower main bead 20. According to this structure, the support member 50 is supported from both sides by the fastening member 60 at the joint portion with the second rod-like portion 52, and the posture can be stabilized. That is, the support member 50 can maintain the posture with the first rod portion 51 horizontal and the second rod portion 52 vertical. Therefore, the strength and stability of the fixation of the metal connectors 303, 403, 503 to the steel bar truss 2 can be improved.
The metal connectors 303 and 403 of the third and fourth embodiments are configured such that the first linear portions 61a and 61b of the fastening member 60 are attached to be positioned on the lower surface side of the lower main rib 20 of the steel-bar truss 2. This can suppress the tilting of the metal link 3 in the metal link-equipped steel truss 4 to which the metal link 3 is attached. Further, in the corrugated board 1 in which the metal-link-equipped steel truss 4 and the bottom plate portion 40 are integrally formed, the metal links 303 and 403 are fixed between the lower main rib 20 of the steel truss 2 and the bottom plate portion 40. Therefore, the metal connectors 303 and 403 can be prevented from falling off the steel bar truss 2.
In the method of manufacturing corrugated board according to the third and fourth embodiments, it is preferable that the metal connectors 303 and 403 are engaged with the steel trusses 2, and then the steel trusses 2 are fixed to the bottom plate portion 40. By performing the engaging step before the fixing step in this manner, the metal connectors 303 and 403 can be engaged with each other from below the lower main bead 20 of the steel-bar truss 2. Therefore, in the engaging step, the work of attaching the metal connectors 303 and 403 to the steel-bar truss 2 is facilitated so that the fastening members 60 of the metal connectors 303 and 403 are positioned on the lower surface side of the lower main bar 20. Therefore, the work efficiency of the manufacturing process of the corrugated board 1 can be improved.
The metal coupler 403 and the metal-coupler-equipped steel truss 4 according to the fourth embodiment are configured such that the fastening member 60 of the metal coupler 403 positions the inclined portion 38 between the first linear portions 61a and 61b facing each other in the longitudinal direction of the steel truss 2. As shown in fig. 28 to 30, in the fastening member 60, portions from the engaging portion 62 to the end of the guide 63 at both ends of the first linear portions 61a and 61b facing each other are inclined so as to be apart from each other in the longitudinal direction of the steel truss 2. Thereby, the metal coupler 403 can be attached to the steel bar truss 2 without interference of the fastening member 60 with the inclined portion 38. Therefore, the metal connector 403 can be easily attached to the steel bar truss 2 in the engaging step.
The metal connector 503 according to the fifth embodiment is configured to be attached by being engaged with the first linear portions 61a and 61b of the fastening member 60 in a state of being in contact with the upper surface side of the lower main bead 20. That is, the first linear portions 61a and 61b are joined to the second rod-like portion 52 in a state where the engaging portion 62 and the guide 63 are bent downward. This makes it easy to attach the metal connector 503 to the lower main bead 20 from above. Therefore, in the method for manufacturing the corrugated board, the engaging step may be performed before the fixing step, or the engaging step may be performed after the fixing step.
The metal connecting member, the steel bar truss with the metal connecting member, and the manufacturing method thereof, and the corrugated sheet and the manufacturing method thereof according to the first to fifth embodiments have the following effects. Further, the metal connection member uses the reference numeral of the first embodiment as a representative.
The metal connector 3 is configured such that the engaging portion 62 of the fastening member 60 is engaged with and abutted against the lower main rib 20 of the steel bar truss 2 of the corrugated board 1. According to this configuration, welding is not required in the work of attaching the metal connector 3 to the lower main bead 20, and therefore, the work efficiency can be improved. Further, due to the structure in which the metal connector 3 is engaged with the lower main bead 20, the strength of fixing the metal connector 3 to the lower main bead 20 can be maintained so that the metal connector 3 is not easily detached from the lower main bead 20.
In the metal-link-equipped steel truss 4, the lower main rib 20 of the steel truss 2 and the engaging portion 62 of the fastening member 60 of the metal link 3 are engaged and abutted, and the metal link 3 is stably engaged with the steel truss 2. This enables the strength of fixing the metal connector 3 to the steel truss 2 to be maintained, and the steel truss 4 with the metal connector can be configured.
The metal-link-equipped steel truss 4 may be configured such that the fastening member 60 of the metal link 3 is disposed on the center side of the inclined portion 38 of the end portion of the lattice material 30 in the longitudinal direction of the steel truss 2, and engages with the lower main rib 20 of the steel truss 2. Thus, in the metal connector 3, since the fastening member 60 is not displaced toward the end side of the steel truss 2 from the inclined portion 38 of the lattice 30, the metal connector 3 can be prevented from coming off the steel truss 2.
The corrugated board 1 is formed by fixing and integrating the steel bar truss 4 with the metal connecting member to the bottom plate portion 40. In the metal-lined steel truss 4, the 2 lower main tendons 20 of the steel truss 2 and the engaging portion 62 of the metal connector 3 are engaged and abutted. Further, the support member 50 of the metal connector 3 is disposed so that the first rod-like portion 51 is along the plate surface of the bottom plate portion 40. According to this structure, the metal connector 3 is stably engaged with the steel truss 2, and the strength of fixing the metal connector 3 and the steel truss 2 can be maintained.
In the method of manufacturing the steel bar truss with the metal coupler, the metal coupler 3 is configured to be engaged and abutted with the lower main bar 20 of the steel bar truss 2 by the engaging portion 62 thereof. Accordingly, in the engaging step of engaging the metal connector 3 with the steel truss 2, it is not necessary to weld the lower main bar 20 and the metal connector 3, and the work of attaching the metal connector 3 to the steel truss 2 is facilitated. Therefore, the work efficiency of the manufacturing process of the steel truss with metal fittings 4 can be improved.
In the method for manufacturing the steel bar truss with the metal connecting pieces, the steel bar truss 2 is configured in such a manner that 2 pieces of lattice material 30 are joined to the upper main bar 10 so as to sandwich the upper main bar 10, and the lower main bars 20 separated in parallel are joined to the lattice material 30. This elastically deforms the steel-bar truss 2, and the interval between the 2 lower main bars 20 can be temporarily narrowed. Therefore, the metal connecting member 3 can be easily attached, and the work efficiency of the manufacturing process of the steel truss with metal connecting member 4 can be improved.
In the method of manufacturing corrugated board, the metal connector 3 is configured such that the engaging portion 62 thereof engages with and abuts against the lower main bar 20 of the steel-bar truss 2. Accordingly, in the engaging step of engaging the metal connector 3 with the steel truss 2, it is not necessary to weld the lower main bar 20 and the metal connector 3, and the work of attaching the metal connector 3 to the steel truss 2 is facilitated. Therefore, the work efficiency of the manufacturing process of the corrugated board 1 can be improved.
In the method for manufacturing the corrugated board, the metal connector 3 is engaged with the steel bar truss 2, and then the steel bar truss 2 is fixed to the bottom plate portion 40. By performing the engaging step before the fixing step in this manner, the metal connector 3 can be engaged with the steel truss 2 without interfering with the bottom plate portion 40. Therefore, the metal coupler 3 can be engaged with the steel truss 2 from any direction according to the installation position of the metal coupler 3. Further, the metal connector 3 can be attached by elastically deforming the steel bar truss 2. Therefore, in the engaging step, the interval between the lower main beads 20 of the steel truss 2 can be made narrower than the length of the first linear portion 61 of the fastening member 60 of the metal connector 3, and the work of attaching the metal connector 3 to the steel truss 2 can be facilitated. Therefore, the work efficiency of the manufacturing process of the corrugated board 1 can be improved.
The height of the second bar-shaped part 52 of the support member 50 of the metal coupler 3 is set between the height h1 of the lower surface side of the upper main rib 10 and the height h2 of the upper surface side of the lower main rib 20 of the steel-bar truss 2. By preventing the second rod-shaped section 52 from extending to the height position of the upper bead 10 in this way, the support member 50 can be disposed in a state where the second rod-shaped section 52 is positioned directly below the upper bead 10. Thus, the metal connector 3 can have a structure in which the support member 50 is positioned at the center between the 2 lower main beads 20, and thus can uniformly support the load applied to the main beads. Further, by setting the length (height H) of the second rod-shaped portion 52 short, the amount of reinforcing steel used in the support member 50 can be suppressed. Therefore, the metal connector 3 can be reduced in weight and can be reduced in cost.
The reinforcing bar truss 2 is configured such that the first joint portions 33a and 33b of the pair of lattice members 30 facing each other are overlapped with each other by facing the peak portions 31a and 31b of the pair of lattice members 30 facing each other with the upper main bar 10 interposed therebetween. Therefore, the portion where the upper bead 10 contacts one of the lattice materials 30a and the portion where the upper bead 10 contacts the other lattice material 30b overlap each other, and the first joining portion 33 facilitates the joining operation of the upper bead 10 and the pair of lattice materials 30 at a time. Therefore, the joining operation can be efficiently performed.
Further, since the trough portions 32 of the lattice material 30 are expanded outward in the width direction, the steel-bar truss 2 can be supported in a wider area, and the steel-bar truss 2 can stably stand alone. Therefore, the rigidity and strength of the steel-bar truss 2 can be improved, and the stability when the steel-bar truss 2 is joined to the bottom plate portion 40 can be improved. Further, since the lattice 30 is bent toward the valley portions 32 to form the leg portions 37, the reinforcing bar truss 2 can be supported by the leg portions 37 of the lattice 30. Therefore, the steel-bar truss 2 can stand alone more stably, and the rigidity and stability can be improved. In addition, the steel bar truss 4 with the metal connecting member and the bottom plate part 40 can be formed into the firm corrugated board 1 as one body.
Further, since the pair of lattice members 30a and 30b are disposed so as to sandwich the upper main bead 10 from both sides in the width direction, and the trough portions 32a and 32b are expanded so as to be apart from each other, the upper main bead 10 can be stably supported from both sides in the width direction by the pair of lattice members 30a and 30 b. Thereby, the upper main bead 10 is uniformly held from the left and right, and deformation of the structural member is suppressed. Therefore, the stability and rigidity of the steel-bar truss 2 can be improved.
Further, by overlapping the welding points of the upper main bead 10 and the pair of lattice members 30a and 30b, the number of welding points can be reduced as a whole, and the work process can be shortened. Further, the amplitude and pitch of the peak portions 31 and the valley portions 32 of the lattice material 30 are fixed, so that the first joining portions 33 and the second joining portions 34 are set to be aligned in a straight line. Therefore, the bending work of the lattice material 30 and the joining work with the upper and lower beads 10, 20 can be efficiently performed, and the work process can be shortened.
The lattice material 30 of the steel-bar truss 2 is expanded to the outside of the steel-bar truss 2, and the steel-bar truss 2 stably stands alone because it has the leg 37 on the valley 32 side of the inclined portion 38. With this structure, the stability of the steel bar truss 2 can be improved when the steel bar truss is joined to the bottom plate 40 and when concrete is poured.
Further, since the lattice materials 30a and 30b are joined to the upper bead 10 and the lower bead 20 without crossing over these beads, respectively, the degree of freedom is increased when selecting the diameters of the upper bead 10, the lower bead 20, and the lattice material 30. Accordingly, the steel-bar trusses 2 of various sizes or heights may be provided. Further, by suppressing the deformation of the upper main bead 10 and the lower main bead 20, the stability and rigidity of the steel truss 2 can be improved.
The steel-bar truss 2 can dispose the lower main bar 20 at an arbitrary position. In a structure in which the lower main reinforcement 20 is disposed inside the steel trusses 2, that is, in a structure in which the second joint portion 34 is set inside the steel trusses 2 in the lattice 30, when a plurality of steel trusses 2 are vertically and reversely stacked on each other, the lower main reinforcement 20 can be prevented from being caught, and the stacking can be easily performed. Therefore, the volume increase during transportation and the like can be suppressed, and space saving can be achieved.
The steel bar truss 2 may be configured as a mountain cut structure in which the end of the lattice 30 is cut at the mountain portion 31, or may be configured as a valley cut structure in which the end of the lattice 30 is cut at the valley portion 32. Therefore, the degree of freedom is higher when the lengths of the steel bar truss 2 and the corrugated board 1 are set. Accordingly, it is possible to provide the corrugated board 1 corresponding to the sizes of various concrete floors.
In the corrugated board 1 having the valley-cut steel bar trusses 2, the valley portions 32 of the lattice material 30 are located at the end of the corrugated board 1. Thus, when the corrugated board 1 is erected on the body member 5 of the building, the valley portions 32 of the lattice material 30 are hung on the member, and the lattice material 30 can transmit the force applied to the upper and lower beads 10, 20 to the body member 5. Thus, a more firm concrete floor can be constructed. In addition, the degree of freedom of the mounting position of the metal connector 3 is improved.
In the first to fifth embodiments, the metal connector 3, the metal-connector-equipped steel bar truss 4, and the method for manufacturing the same, and the corrugated board 1 and the method for manufacturing the same can be provided in which the lower main rib 20 of the steel bar truss 2 and the metal connector 3 provided in parallel to the corrugated board 1 are engaged without welding, and the work efficiency of the connection and the strength for maintaining the connection and fixation can be improved.
< Effect of the first embodiment and the second embodiment >
In addition to the above-described common effects, the first and second embodiments have the following effects. In the metal connectors 3 and 203, the fastening member 60 is engaged with the lower main rib 20 of the steel truss 2, and the frame-shaped member 70 is in contact with the plate surface of the bottom plate portion 40. Thus, the frame-shaped member 70 of the metal connector 3, 203 attached to the lower main rib 20 can be configured such that the second straight portion 71 is fixed to the plate surface of the bottom plate portion 40 while being in contact with the lower main rib 20. Therefore, the metal connectors 3 and 203 are more stably engaged with the steel-bar truss 2.
In the metal connectors 3 and 203 according to the first and second embodiments, the expanded portion 72 of the frame-like member 70 is disposed at a position closer to the trough portion 32 of the lattice material 30 of the steel-bar truss 2. This allows the steel-bar truss 2 to be more stably fixed to the plate surface of the bottom plate 40. The engaging portion 62 of the fastening member 60 is attached in a state of being wrapped around the lower main bar 20 of the steel bar truss 2. This makes it difficult for the metal connectors 3 and 203 to be disengaged from the lower main links 20, and more stable engagement with the steel truss 2 is achieved. Therefore, the fixing strength and stability of the metal connector 3, 203 to the lower main bead 20 can be improved.
In the metal connectors 3 and 203, the fastening member 60 and the frame member 70 are made of the same material having the same diameter and the same material as the lattice material 30 of the steel-bar truss 2. Thus, the frame-shaped member 70 can be fixed to the plate surface of the bottom plate portion 40 under the same conditions as in the step of fixing the trough portions 32 of the lattice material 30 to the plate surface of the bottom plate portion 40. Therefore, the labor for setting the welding conditions can be reduced, and the work efficiency of the manufacturing process of the corrugated board 1 can be improved.
In addition, the metal connector 3 or 203 is configured to be expanded outward by the frame-shaped member 70, so that the expanded portion 72 is brought into contact with the protruding portion 41 of the bottom plate portion 40, and the welding portion 73 is set on the upper surface of the protruding portion 41. Therefore, the metal connectors 3 and 203 can be fixed to the bottom plate portion without being welded to the flat surface portion of the bottom plate portion 40. Therefore, the corrugated board 1 having no welding trace in the flat surface portion of the bottom plate portion 40 can be constituted.
In the steel bar truss with metal links 4 of the first and second embodiments, the expanded portion 72 of the frame-like member 70 is disposed at a position close to the trough portion 32 of the lattice material 30. Therefore, the fixing portion 39 is set at a position close to the welded portion 73 at the end of the steel-bar truss 2. Thus, in the manufacturing process of the corrugated board 1, the fixing process and the welding process can be easily performed in the same production line process, and the work efficiency can be improved.
In the corrugated board 1 having the mountain-cut steel bar truss 2, the leg 37 is not hung on the body girder 5. Therefore, the metal link 3 or 203 is positioned further to the outside than the lower inclined portion 38D of the lattice 30 at the end of the steel truss 2 in the longitudinal direction of the steel truss 2, so that the support member 50 of the metal link 3 or 203 is positioned further to the end side of the bottom plate portion 40, and the load of the corrugated board 1 is transmitted to the body beam 5. The engaging portion 62 of the fastening member 60 engages while wrapping around the lower bead 20, and the frame-like member 70 is adjacent to the lower inclined portion 38D. Thereby, the metal connectors 3 and 203 are stably attached to the steel bar truss 2 and fixed to the bottom plate portion 40 at positions close to the leg portions 37. Therefore, the strong corrugated board 1 can be constructed.
In the method of manufacturing corrugated board according to the first and second embodiments, in the welding step, the expanded portion 72 of the frame-like member 70 of the metal connector 3 or 203 is welded to the bottom plate portion 40 of the corrugated board 1. This allows the metal connectors 3 and 203 to be stably fixed to the corrugated board 1, and also allows the strength of fixing the steel-bar truss 2 to the bottom plate 40 to be increased. In addition, the welding in the welding step can be mechanically welded under the same conditions in the same production line as in the fixing step. This can suppress variation in the strength of fixing the metal-link-equipped steel truss 4 and the bottom plate 40, and can improve the rigidity and strength stability of the corrugated board 1. In addition, the work efficiency of the process of manufacturing the corrugated board 1 can be improved.
The metal connector 3 of the first embodiment is configured to be fixed to the bottom plate portion 40 in a state in which the second linear portion 71 of the frame-like member 70 is bridged over the lower main bead 20. The engaging portion 62 of the fastening member 60 is attached in a state of wrapping the lower main bar 20 of the steel bar truss 2 to the lower surface side thereof. This makes it difficult for the metal connector 3 to be disengaged from the lower main link 20, and more stably engages with the steel-framed truss 2. Therefore, the strength and stability of the fixation of the metal connector 3 to the lower main bead 20 can be improved.
The metal connector 3 of the first embodiment is configured such that the frame-like member 70 is hung on the lower main rib 20 closer to the lattice 30 at the end of the steel truss 2, and the expanded portion 72 is fixed to the bottom plate portion 40. Thereby, the steel bar truss 4 with the metal connecting member is more stably fixed to the bottom plate portion 40 of the corrugated board 1. Therefore, the strength and stability in the engagement between the steel-bar truss 2 and the metal connector 3 and the fixation between the steel-bar truss with metal connector 4 and the bottom plate portion 40 can be improved.
In addition, in the metal connector 3 of the first embodiment, the second rod-shaped portion 52 of the support member 50 is supported from both sides by the fastening member 60 and the frame-shaped member 70. This stabilizes the posture of the metal connector 3 of the metal-connected steel bar truss 4. That is, the metal connector 3 can maintain the posture with the first rod portion 51 of the support member 50 horizontal and the second rod portion 52 vertical. Therefore, the metal coupler 3 can be stably attached to the steel bar truss 2 without welding the support member 50 to the upper main bar 10. The support member 50 may be configured such that the height H of the second bar-shaped portion 52 is set between the height H1 on the lower surface side of the upper bead 10 and the height H2 on the upper surface side of the lower bead 20, and the second bar-shaped portion 52 does not extend to the height of the upper bead 10. Therefore, the steel-bar truss 2 and the metal connecting member 3 can be engaged with the main bar without welding, and the strength of the connection and fixation can be maintained while improving the work efficiency of the connection.
The corrugated board 1 having the valley-cut steel bar truss 2 may be configured such that the leg 37 is hung on the body beam 5, and therefore the metal connector 3 is positioned on the center side of the upper inclined portion 38U of the lattice material 30 at the end of the steel bar truss 2 in the longitudinal direction of the steel bar truss 2. Thus, the metal connector 3 of the first embodiment is locked to the lower bead 20 and the upper inclined portion 38U at the second joining portion 34, and is less likely to be detached from the lower bead 20. Further, the engaging portions 62 of the fastening members 60 extend downward from both ends of the first linear portion 61, whereby the metal fittings 3 can be easily attached to the steel trusses 2. Therefore, the strength of fixing the metal-link-attached steel bar truss 4 and the bottom plate portion 40 can be maintained, and the work efficiency of the manufacturing process of the corrugated board 1 can be improved.
The metal connector 203 according to the second embodiment is configured such that the first linear portion 61 of the fastening member 60 and the second linear portion 71 of the frame-shaped member 70 support the lower main bar 20 of the steel-bar truss 2 from the lower surface side thereof. This can suppress the metal connector 203 from lifting. The engaging portion 62 of the fastening member 60 engages with the lower main link 20 while wrapping around the outer peripheral surface of the lower main link 20 of the steel-bar truss 2. As a result, the metal connector 203 is less likely to be detached from the lower main rib 20, and is more stably engaged with the steel-bar truss 2. Therefore, the strength and stability of the fixation of the metal connector 203 to the lower bead 20 can be improved.
The metal connector 203 of the second embodiment arbitrarily sets the amount of wrapping of the engaging portion 62 in a state where the fastening member 60 is engaged with the lower bead 20. By reducing the amount of wrapping of the engaging portion 62, the metal connector 203 can be easily engaged from below the lower bead 20 without sliding the metal connector 203. Therefore, the fastening member 60 is positioned on the center side of the inclined portion 38 of the lattice 30 at the end of the steel truss 2, and the metal connector 203 is easily attached.
In addition, in the metal connector 203 of the second embodiment, the second rod-shaped portion 52 of the support member 50 is supported from both sides by the fastening member 60 and the frame-shaped member 70. With this configuration, the posture of the metal link 203 of the metal-link-equipped steel truss 4 can be stabilized. That is, the metal link 203 can maintain the posture in a state where the first rod portion 51 of the support member 50 is horizontal and the second rod portion 52 is vertical. Therefore, the metal coupler 203 can be stably attached to the steel bar truss 2 without welding the support member 50 to the upper main bar 10. The support member 50 may be configured such that the height H of the second bar-shaped portion 52 is set between the height H1 on the lower surface side of the upper bead 10 and the height H2 on the upper surface side of the lower bead 20, and the second bar-shaped portion 52 does not extend to the height of the upper bead 10. Therefore, the steel-bar truss 2 and the metal connector 203 are engaged with the main bar without welding, so that the work efficiency of connection can be improved and the strength of connection and fixation can be maintained.
The metal connector 203 according to the second embodiment has a function of supporting a load applied to the steel bar truss 2 more stably by a structure in which the lower main bead 20 is supported from below. Therefore, the strength and rigidity of the steel bar truss 4 with the metal connecting member can be improved. Further, a stronger corrugated board 1 can be configured.
In the corrugated board 1 of the second embodiment, the frame-like member 70 of the metal connector 203 is fixed between the lower main bead 20 and the bottom plate portion 40. According to this structure, the metal connector 203 can be more stably coupled to the steel bar truss 2 and the bottom plate portion 40. Therefore, the strength and rigidity of the corrugated board 1 can be improved.
< effects of the third embodiment to the fifth embodiment >
In the third to fifth embodiments, in addition to the above-described common effects, the following effects are also obtained. In the metal connectors 303, 403, and 503, the fastening member 60 is engaged with and abutted against the lower bead 20 at the engaging portion 62 thereof. The first linear portion 61 of the fastening member 60 supports the second rod-like portion 52 of the support member 50 of the metal links 303, 403, and 503 so as to be sandwiched from both sides in the radial direction. According to this structure, the portions of the metal links 303, 403, and 503 that contact the lower bead 20 become larger, and the strength and stability of the fixation of the metal links 303, 403, and 503 to the lower bead 20 can be improved.
The metal-link-equipped steel truss 4 according to the third to fifth embodiments may be configured to engage with the lower main rib 20 of the steel truss 2 such that the inclined portion 38 of the lattice material 30 of the steel truss 2 is positioned between the first linear portions 61a and 61b of the fastening members 60 of the metal links 303, 403, and 503. Thereby, the fastening members 60 sandwich the inclined portions 38 of the lattice material 30, and therefore, the metal links 303, 403, and 503 can be prevented from falling off the steel-bar truss 2.
The metal connectors 303, 403, and 503 according to the third to fifth embodiments are configured such that the guide 63 provided at the end of the engaging portion 62 of the fastening member 60 guides the outer peripheral surface of the lower bead 20, and the engaging portion 62 engages and abuts with the lower bead 20. This makes it easy to attach the metal connectors 303, 403, and 503 to the lower main bead 20, and improves the work efficiency of the engagement step.
In the steel truss with metal links 4 of the third and fourth embodiments, the first linear portions 61a and 61b of the fastening members 60 of the metal links 303 and 403 are positioned on the lower surface side of the lower main rib 20 of the steel truss 2 and engage with the lower main rib 20. With this configuration, the metal link 3 can be prevented from being lifted up, and the strength and stability of fixing the metal link 3 and the steel-bar truss 2 can be improved.
In the method for manufacturing corrugated board according to the third and fourth embodiments, it is preferable that the metal connectors 303 and 403 are engaged with the steel-bar truss 2, and then the steel-bar truss 2 is fixed to the bottom plate portion 40. By performing the engaging step before the fixing step in this manner, the metal connectors 303 and 403 can be engaged with the steel truss 2 from below the steel truss 2. Therefore, in the engaging step, the work of attaching the metal connectors 303 and 403 to the steel truss 2 is facilitated so that the fastening members 60 of the metal connectors 303 and 403 are positioned on the lower surface side of the lower main rib 20 of the steel truss 2. Therefore, the work efficiency of the manufacturing process of the corrugated board 1 can be improved.
In the corrugated board 1 according to the third and fourth embodiments, the fastening members 60 of the metal connectors 303 and 403 are positioned below the lower main rib 20 and fixed between the lower main rib 20 and the bottom plate portion 40. Therefore, the metal links 303 and 403 can be prevented from being lifted up, and the strength and stability of the connection between the metal link 3 and the lower main bead 20 can be improved.
The metal connecting member, the steel bar truss with the metal connecting member, the manufacturing method thereof, the corrugated sheet, and the manufacturing method thereof according to the present invention are not limited to the first to fifth embodiments, and may be implemented in other various ways.
The diameter and material of the reinforcing bars used in the steel bar truss 2 can be selected arbitrarily, and reinforcing bars having the same diameter as the upper main bar 10 and the lower main bar 20 may be used, or reinforcing bars having different diameters may be used. The reinforcing bars are not limited to those having a circular cross-sectional shape, and various types and cross-sectional shapes of reinforcing bars may be used. The height positions of the upper main link 10 and the lower main link 20 can be set as appropriate according to the size of the steel truss 2. Further, the upper main bead 10 and the lower main bead 20 are not limited to the linear shape, and may be machined into other shapes such as an arc shape according to the design of the floor. In the first to fifth embodiments, the example in which the hot-dip galvanized steel sheet is used for the bottom plate portion 40 is shown, but another metal plate may be used.
The height positions of the upper main rib 10 and the lower main rib 20 of the steel-bar truss 2 can be set as appropriate according to the size of the steel-bar truss 2. In addition, the position of the second engagement portion 34 can be set arbitrarily. That is, the lower main links 20 may be joined to any position inside or outside the steel-bar truss 2 when viewed in the width direction. The position of the bending point 36 of the lattice material 30 can be set arbitrarily. Therefore, the steel trusses 2 having various heights and widths can be constructed.
The wave shape of the lattice material 30 of the steel-bar truss 2 is not limited to a structure in which the peak portions 31 and the valley portions 32 are repeated at the same amplitude and the same pitch, and may be configured to partially include different amplitudes or different pitches. For example, the lattice material 30 may be formed by repeating the peak portions 31 and the valley portions 32 at locally different amplitudes in accordance with the difference in height of the floor.
The angle θ 5 of expansion of the lattice 30 and the angle θ 6 of bending of the lattice 30 at the bending point 36 as viewed in the longitudinal direction of the steel truss 2 can be set arbitrarily, and the expansion of the lattice 30 in the width direction can be suppressed by reducing the angle θ 5 of expansion. Further, the lattice material 30 may be configured not to expand in the width direction.
The reinforcing bar truss 2 is not limited to the structure of being cut at the peak portions 31 or the valley portions 32 of the lattice 30, and may be cut at the inclined portions 38. The metal connector 3 can be attached to any position on the end of the steel truss 2 as long as the first rod-shaped portion 51 of the support member 50 is hung on the body beam 5 by projecting a predetermined amount from the end of the bottom plate portion 40.
The shape of the support member 50 of the metal link 3 is not limited to the L-shape, and may be other shapes. That is, the angle formed by the first rod-like part 51 and the second rod-like part 52 may not be a right angle, and bending at an arbitrary angle is possible. In addition, the support member 50 may use a round reinforcing bar, or may use a deformed reinforcing bar. Further, the material and diameter of the reinforcing bar can be selected arbitrarily.
In addition, in any case of the mountain cut, the valley cut, or the like of the lattice material 30 of the steel truss 2, the metal connecting member 3 can be attached as long as it is configured to engage with the lower main rib 20 of the steel truss 2. Further, the reinforcing bar truss 2 may be attached to the end side, the center side, or any position of the inclined portion 38 at the end of the reinforcing bar truss 2 in the longitudinal direction, or the shape of the fastening member 60 may be changed depending on the attachment position. Thereby, various steel bar trusses 4 with metal connectors and corrugated boards 1 can be provided.
In the engaging step of attaching the metal connector 3 to the steel truss 2, the metal connector 3 may be attached without elastically deforming the steel truss 2. In the engagement step, depending on the structure of the metal connector 3, the metal connector 3 may be attached to the steel bar truss 2 from below the lower main bar 20 or may be attached from above the lower main bar 20. Alternatively, the mounting may be from other directions. The engaging step and the fixing step in the method for producing corrugated board may be performed first from either side depending on the structure of the metal connector 3, or may not be performed in a predetermined order.
The metal connectors 3 and 203 according to the first and second embodiments are formed by bending the expanded portions 72 extending from both ends of the second linear portion 71 of the frame member 70 into L-shapes, but are not limited to this shape, and may be formed so as to be joined to the bottom plate portion 40. For example, the second straight portion 71 may extend in a curved line. The fastening member 60 of the metal connector 3 according to the first embodiment is not limited to the configuration in which the engaging portion 62 is wrapped around the lower surface side of the lower bead 20, and may be configured to engage with the lower bead 20.
The diameters and materials of the fastening member 60 and the frame-like member 70 of the metal connectors 3 and 203 according to the first and second embodiments are not limited to the same diameter and the same material as the lattice material 30 of the steel truss 2, and may be different diameters and different materials.
In the steel-bar truss with metal links 4 according to the first and second embodiments, the frame-shaped members 70 of the metal links 3 and 203 are located adjacent to the inclined portions 38 of the steel-bar truss 2, but the fastening members 60 may be located adjacent to the inclined portions 38.
The metal connectors 303, 403, and 503 according to the third to fifth embodiments are not limited to the structure in which the fastening member 60 sandwiches the second rod-shaped portion 52 of the support member 50 from both sides in the radial direction with respect to the second rod-shaped portion 52, and may be a structure in which the fastening member 60 is joined to only one side in the radial direction of the second rod-shaped portion 52. The engaging portion 62 of the fastening member 60 is configured to have the guide 63, but may be configured not to have the guide 63, and may be configured to engage with the lower main bar 20 of the steel-bar truss 2.
The fastening member 60 of the metal connector 403 according to the fourth embodiment may be configured such that only one first linear portion 61 is inclined in the longitudinal direction of the steel-bar truss 2. That is, portions from the engaging portion 62 to the end of the guide 63 at both ends of the opposing first linear portions 61a and 61b are inclined so as to be spaced apart from each other, but for example, one of the first linear portions 61a may be inclined along the inclined portion 38.
In addition, the metal connector 403 of the fourth embodiment is configured such that the inclined portion 38 is positioned between the opposing first linear portions 61a, 61b in the longitudinal direction of the steel truss 2 by the fastening member 60, but even when the metal connector 403 is attached to another position, one of the first linear portions 61 may be inclined along the inclined portion 38. This allows the metal connector 403 to be attached to the steel truss 2 without interference between the fastening member 60 and the inclined portion 38.
Claims (18)
1. A metal connecting member connected to an end of a corrugated board erected on a main beam of a building, the corrugated board being formed by integrating a steel bar truss and a bottom plate as a structural material for a concrete floor slab, the steel bar truss comprising: an upper main rib extending linearly; 2 lower main beads extending in parallel in a linear shape below the upper main beads and separated from each other; and a pair of lattice materials formed in a wave shape in which mountain portions and valley portions are repeated along a longitudinal direction of the upper main bead;
the metal connecting member is characterized by comprising:
a support member having a first rod-shaped portion extending in a plate surface direction of the bottom plate portion of the corrugated board, and a second rod-shaped portion formed by bending one end of the first rod-shaped portion and extending upward; and
and a fastening member having a first linear portion crossing and joined to the second rod-shaped portion of the support member, and an engaging portion maintaining a state of being engaged with the lower main bar of the steel bar truss at both ends of the first linear portion.
2. The metal connection according to claim 1,
in addition to the fastening member, a frame-like member,
the frame-shaped member has:
a second linear portion intersecting and joined to the second rod-shaped portion of the support member, an
An expanding portion extending from both ends of the second linear portion toward the plate surface of the bottom plate portion, and having lower ends that expand laterally so as to be separated from each other, and that abut against the plate surface of the bottom plate portion;
the expanded portion of the frame-shaped member extends to a protruding strip portion that protrudes from the bottom plate portion of the corrugated board and is engageable with the trough portion of the lattice material of the steel truss, and the protruding strip portion is engageable with the protruding strip portion.
3. Metal connection piece according to claim 2,
the fastening member is configured such that the first linear portion is in contact with a lower surface side of the lower main rib of the steel bar truss, and the engaging portion engages with the lower main rib in a state of being wrapped around an outer peripheral surface of the lower main rib,
in the frame-shaped member, the second linear portion supports the lower main bar from a lower surface side of the lower main bar of the steel bar truss.
4. Metal connection piece according to claim 2,
the fastening member is configured such that the first linear portion is in contact with an upper surface side of the lower main rib of the steel bar truss, and the engaging portion is attached in a state of being wrapped around a lower surface side of the lower main rib,
in the frame-shaped member, the second linear portion is bridged over the 2 lower main ribs.
5. Metal connection according to one of claims 2 to 4,
the frame-shaped member is disposed adjacent to an inclined portion of an end portion of the lattice member, the inclined portion connecting the peak portion and the trough portion, in a longitudinal direction of the steel truss.
6. Metal connection according to one of claims 2 to 4,
the frame-shaped member is formed of a material having the same diameter and the same material as the lattice material of the steel bar truss.
7. The metal connection according to claim 1,
the fastening members are opposed to each other so that the first linear portions sandwich the second rod-shaped portion from both sides in a radial direction of the second rod-shaped portion.
8. The metal connection according to claim 7,
the fastening member is configured to be engaged and attached in a state where the first straight portion is in contact with a lower surface side of the lower main bead.
9. A steel bar truss with metal connecting pieces is characterized by comprising the following components:
the metal connection of any one of claims 2 to 4, and
a steel bar truss;
the pair of lattice members of the steel bar truss are opposed to each other so as to sandwich the upper main rib from both sides in a width direction intersecting with a longitudinal direction of the upper main rib, the peak portions are joined to the upper main rib, and intermediate portions between the peak portions and the trough portions are joined to the lower main rib, respectively,
in the fastening member of the metal connector, the engaging portion is engaged with the lower main bar of the steel bar truss,
the frame-shaped member of the metal connector is located adjacent to an inclined portion of an end of the lattice material, which connects the peak portion and the trough portion, in a longitudinal direction of the steel bar truss.
10. The reinforcing bar truss with metal connecting members as claimed in claim 9,
the fastening member of the metal link is located on a central side of an inclined portion of an end of the lattice material, which connects the peak portion and the trough portion, in a longitudinal direction of the steel bar truss.
11. A steel bar truss with metal connecting pieces is characterized by comprising the following components:
the metal connecting member as claimed in claim 7 or 8, and
a steel bar truss;
the pair of lattice members of the steel bar truss are opposed to each other so as to sandwich the upper main rib from both sides in a width direction intersecting with a longitudinal direction of the upper main rib, the peak portions are joined to the upper main rib, and intermediate portions between the peak portions and the trough portions are joined to the lower main rib, respectively,
the clamping part of the fastening member of the metal connecting piece is clamped with the lower main rib of the steel bar truss.
12. The reinforcing bar truss with metal connecting members as claimed in claim 11,
in the fastening member of the metal link, in a longitudinal direction of the steel bar truss, an inclined portion of an end portion of the lattice material that connects the peak portion and the valley portion is located between the first linear portions that face each other.
13. Corrugated board, characterized by having:
the steel bar truss with metal connecting members of claim 9, and
a bottom plate portion made of metal;
the reinforcing steel bar truss with the metal connecting piece is integrally fixed on the plate surface of the bottom plate part in a state that a plurality of reinforcing steel bar trusses are arranged in parallel at a predetermined interval.
14. A manufacturing method of a steel bar truss with metal connecting pieces is characterized by comprising the following steps:
a steel bar truss forming process for forming the steel bar truss, wherein the steel bar truss is provided with: an upper main rib extending linearly, 2 lower main ribs extending linearly in parallel below the upper main rib, and a pair of lattice members formed in a wave shape repeating a peak portion and a valley portion along a longitudinal direction of the upper main rib, the peak portion being joined to the upper main rib, and an intermediate portion between the peak portion and the valley portion being joined to the lower main rib;
a support member forming step of forming a support member having a first rod-shaped portion extending in a rod shape and a second rod-shaped portion formed by bending and extending one end of the first rod-shaped portion;
a fastening member forming step of forming a fastening member having a first linear portion that intersects and is joined to the second bar-shaped portion of the support member, and an engaging portion that maintains a state of being engaged with the lower main bar of the steel bar truss at both ends of the first linear portion;
a metal connector molding step of joining the support member and the fastening member to form a metal connector; and
and a clamping procedure, namely clamping the metal connecting piece to the steel bar truss.
15. The method for manufacturing a reinforcing bar truss with metal connecting members as recited in claim 14,
in the engaging step, after the steel bar truss is elastically deformed so that the 2 lower main tendons of the steel bar truss are close to each other, the metal connector is attached to engage the metal connector with the steel bar truss.
16. A method of manufacturing corrugated board, comprising:
a steel bar truss forming process for forming the steel bar truss, wherein the steel bar truss is provided with: an upper main rib extending linearly, 2 lower main ribs extending linearly in parallel below the upper main rib, and a pair of lattice members formed in a wave shape repeating a peak portion and a valley portion along a longitudinal direction of the upper main rib, the peak portion being joined to the upper main rib, and an intermediate portion between the peak portion and the valley portion being joined to the lower main rib;
a support member forming step of forming a support member having a first rod-shaped portion extending in a rod shape and a second rod-shaped portion formed by bending and extending one end of the first rod-shaped portion;
a fastening member forming step of forming a fastening member having a first linear portion that intersects and is joined to the second bar-shaped portion of the support member, and an engaging portion that maintains a state of being engaged with the lower main bar of the steel bar truss at both ends of the first linear portion;
a metal connector molding step of joining the support member and the fastening member to form a metal connector;
a clamping process of clamping the metal connecting piece to the steel bar truss, and
and a fixing step of fixing the valley portions of the steel bar trusses to a plate surface of a bottom plate portion of a structure for a concrete floor slab.
17. A method of manufacturing corrugated board according to claim 16, comprising:
a frame-shaped member forming step of forming a frame-shaped member having: a second linear portion intersecting and joined to the second rod-shaped portion of the support member, and an expanding portion configured such that both ends of the second linear portion extend toward the plate surface of the bottom plate portion, and lower ends of the second linear portion expand laterally so as to be separated from each other, and are brought into contact with the plate surface of the bottom plate portion;
a metal connector molding step of joining the support member, the fastening member, and the frame-shaped member to form a metal connector; and
and a welding step of welding the expanded portion of the frame-shaped member of the metal connector to the plate surface of the bottom plate portion.
18. A method of manufacturing corrugated board according to claim 16 or 17,
the engaging step is performed before the fixing step.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-083162 | 2020-05-11 | ||
| JP2020083162A JP7079434B2 (en) | 2020-05-11 | 2020-05-11 | Connecting metal fittings, reinforcing bar truss with connecting metal fittings and their manufacturing method, and deck plate and its manufacturing method |
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| CN113638547A true CN113638547A (en) | 2021-11-12 |
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| CN202110342768.7A Pending CN113638547A (en) | 2020-05-11 | 2021-03-30 | Metal connecting piece, steel bar truss and manufacturing method thereof, corrugated board and manufacturing method thereof |
Country Status (3)
| Country | Link |
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| JP (1) | JP7079434B2 (en) |
| KR (1) | KR20210137895A (en) |
| CN (1) | CN113638547A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102436014B1 (en) * | 2021-12-07 | 2022-08-23 | 정성래 | Deck plate having reinforced structure |
| CN114669697B (en) * | 2022-03-28 | 2023-04-11 | 江西中一建工集团有限公司 | Equipment and method for manufacturing assembly type building steel bar truss structure |
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| JPH0469522U (en) * | 1990-10-29 | 1992-06-19 | ||
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| JP2007262859A (en) * | 2006-03-30 | 2007-10-11 | Shigeru Yaguchi | Deck plate |
| CN103243851A (en) * | 2012-02-10 | 2013-08-14 | Kentec株式会社 | Material for building floorslab |
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| JP2886160B1 (en) * | 1998-05-19 | 1999-04-26 | 沼田金属工業株式会社 | Floor structural materials |
| KR20050028578A (en) * | 2003-09-18 | 2005-03-23 | 정기환 | Crank shape of a truss girder in a reinforced concrete structure |
| KR101375126B1 (en) * | 2013-08-26 | 2014-03-19 | 동아에스텍 주식회사 | Functional deck-plate |
| JP2020186602A (en) * | 2019-05-16 | 2020-11-19 | ケンテック株式会社 | Deck plate connection member and deck plate connection method |
| JP6664728B1 (en) * | 2019-12-05 | 2020-03-13 | 株式会社富士昭技研 | Deck plate fixing device and deck plate fixing device |
| JP2021134515A (en) * | 2020-02-26 | 2021-09-13 | ケンテック株式会社 | Deck plate connection method |
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- 2020-05-11 JP JP2020083162A patent/JP7079434B2/en active Active
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2021
- 2021-02-25 KR KR1020210025352A patent/KR20210137895A/en active Search and Examination
- 2021-03-30 CN CN202110342768.7A patent/CN113638547A/en active Pending
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|---|---|---|---|---|
| US4989388A (en) * | 1989-02-24 | 1991-02-05 | Hawkeye Concrete Products Co. | Spacer for spacing reinforcing mesh wire from the form in the manufacture of concrete pipe and the like |
| JPH0469522U (en) * | 1990-10-29 | 1992-06-19 | ||
| JPH07292864A (en) * | 1994-04-27 | 1995-11-07 | Tooami:Kk | Spacer for reinforcing bar |
| JP2007262859A (en) * | 2006-03-30 | 2007-10-11 | Shigeru Yaguchi | Deck plate |
| CN103243851A (en) * | 2012-02-10 | 2013-08-14 | Kentec株式会社 | Material for building floorslab |
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|---|---|
| JP7079434B2 (en) | 2022-06-02 |
| KR20210137895A (en) | 2021-11-18 |
| JP2021179080A (en) | 2021-11-18 |
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