JP2009102909A - Embedded hardware and method of mounting the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide embedded hardware so mounted with a high mounting efficiency that reinforcements arranged in the components of a concrete building do not interfere with the bar member for fixing of the embedded hardware and a method of mounting the embedded hardware. <P>SOLUTION: This embedded hardware 10 comprises a plate member 1 of a predetermined shape in plan view and fixing bar members 2 of a predetermined quantity secured to one wide side-surface 11 of the plate member 1. The center position P0 of one side-surface 11 of the plate member 1 and the center position P1 of a polygon formed by joining the positions Q1, Q2, Q3, Q4 at which the fixing bar members 2 of a predetermined quantity are secured to the plate member 1 are displaced from each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an embedded metal that is embedded in a component of a concrete building and supports a pipe and the like, and a method of attaching the embedded metal to a concrete building.

  Buildings made of reinforced concrete (hereinafter referred to as “concrete buildings”) are constructed over a wide range of buildings such as condominiums, buildings, and various plant facilities in addition to general houses. Heavy components such as pipes, electric wires, windbreak walls, hardware for supporting them, and steel materials are usually connected to the components forming the concrete building, such as columns, walls, beams, and ceiling floors.

  In general, this heavy load connection method is to embed an embedded metal with a bar such as a reinforcing bar or bar-shaped metal in a reinforced concrete component, and weld a pipe to one side of the embedded metal facing the outside. It is to be equal.

  The embedding position of the embedded metal in the component member is set in advance at the design stage, but since various components such as various reinforcing bars and duct pipes are disposed inside the reinforced concrete component member. The fixing bar fixed to the embedded metal often interferes with the reinforcing bars and the like, which is one of the factors that require time and labor for mounting the embedded metal. Here, the various reinforcing bars in the constituent members are the main reinforcing bars extending in the vertical and horizontal directions if they are walls, and the vertical reinforcing bars and the hoop bars surrounding them if they are columns. For example, it is a main reinforcing bar extending in the horizontal direction and a shear reinforcing bar such as a stirrup, and if it is a ceiling floor, it is a main reinforcing bar that spreads across the surface and a stirrup that reinforces it.

  When the fixing bar fixed to the embedded metal interferes with these reinforcing bars, the placement position of the embedded metal is determined in advance, so this bar must be bent, It takes time to bend metal bars and steel bars, and the bending process may reduce the strength of the bars and may not be able to fully demonstrate the initial anchor effect. There are many challenges in bending.

  A technique related to an embedded metal for solving the above problem is disclosed in Patent Document 1. In this embedded metal fitting, the screw portion at the tip of the stud diver is screwed into the screw hole drilled in the plate and is embedded in the ceiling or the like of the concrete building. In advance, a screw hole is selected at a position where the bar arrangement in the building and the stud dowel do not interfere with each other when attaching the embedded hardware, and the stud dowel is screwed into this.

JP 2005-133360 A

  According to the embedded metal object disclosed in Patent Document 1, the stud gibber can be fixed at a plate position that does not interfere with the bar arrangement in the component forming the building. The problem of bending and the like is solved. However, in this embedded metal object, it is necessary to provide a large number of screw holes in the plate, and it is inevitable to reduce the strength of the plate itself. The stud gibber is intended to prevent the plate supporting the heavy object from coming out of the building member, but by providing a large number of holes, the strength of the plate itself is reduced. There is also the possibility of breaking. In addition, since the screw holes of a specified number or more are provided for each plate, the manufacturing cost is inevitably high. Further, when mounting, the position where there is no interference with the bar arrangement is searched one by one, and the stud gibel is screwed into each screw hole, so it goes without saying that the mounting efficiency is extremely low. This low efficiency becomes even more pronounced when there are a large number of gibels per plate or a large number of embedded plates.

  The present invention has been made in view of the above-described problems, and relates to an embedded metal fixture in which a fixing bar embedded in a component forming a concrete building is fixed to a plate material, and internal reinforcement of the component It is not necessary to bend the fixing bar to avoid interference with the fixing bar, and the mounting efficiency is extremely high when mounting the embedded metal so that the internal bar arrangement and the fixing bar do not interfere with each other. It is an object to provide an embedded metal fitting and a method for attaching the embedded metal fitting.

  In order to achieve the above object, the embedded metal object according to the present invention is an embedded metal object embedded in a predetermined position in a component forming a concrete building, and the embedded metal object has a predetermined shape in plan view. In an embedded metal article comprising a plate material and a predetermined number of plate material fixing rods fixed to one wide side surface of the plate material, a centroid position on the one side surface of the plate material and a predetermined number of fixings The position of the polygonal centroid formed by connecting the respective sticking positions of the bar material to the plate material is shifted.

  Here, the plate material is a metal or steel plate material, the thickness thereof is arbitrary depending on the required proof stress, and the plan view shape thereof is a square such as a square, a rectangle, a rhombus, other polygons, a circle, Any shape such as an ellipse can be selected.

  A plate material fixing rod for fixing one of the two wide surfaces of the plate material to one surface (one side surface) in the component of the concrete building so that the plate material does not come out of the component. The material is fixed. Further, the other side surface of the plate material faces the surface of the component member, and a pipe or the like is directly welded, or an attachment member such as a U-ring is welded to the other side surface to indirectly support the pipe or the like.

  The fixing bar can be a known bar such as deformed bar, round bar, threaded bolt, gibber, stud gibber, etc., and the number of bars fixed to the plate is, for example, 4, 5 or more. The number that satisfies the required pulling strength can be set. In addition, the length, that is, the fixing length, can be set to a length that satisfies the required pulling strength (friction with concrete, shear strength of the virtual cone fracture surface, etc.).

  A predetermined number of fixing rods are fixed to one side surface of the plate material by welding, pressure welding (friction pressure welding, etc.), etc., and the embedded metal of the present invention is formed. It should be noted that a threaded hole may be provided in the plate material, and a fixing form in which the end of the fixing rod is threaded and screwed may be used. However, in this case as well, unlike the above-described Patent Document 1, the plate material is used. Only the threaded holes of the number of fixing rods to be fixed are drilled.

  The embedded metal of the present invention connects the centroid position of the shape formed by the edge (outer side) of the plate material having the predetermined shape described above and the fixing positions of the plurality of fixing rods fixed to the plate material. The position of the centroid of the polygon formed in the above is shifted so as not to coincide.

  For example, four fixing rods are fixed in a square arrangement on a square plate member in plan view, and the embedded metal is formed in such a manner that each side of the square of the plate member corresponds to each side of the square of the fixing rod. If the centroid positions of both squares are shifted, all four separation lengths between the sides are different from each other, two of the four are the same separation length, and the other two are different from this. There will be a form in which two of them have the same separation length.

  When there are three or more fixing rods, a polygon is formed at the fixing position of the fixing rod and the centroid position is determined. However, when there are two fixing rods, The center position may be set as the centroid position, and in the case of one, the fixing position may be set as the centroid position and shifted from the centroid position of the plate material.

  As described above, by fixing a plurality of fixing bars to the plate material so as to have different separation lengths, an embedded metal is formed, so that this embedded metal is placed at a predetermined mounting position in a component of a concrete building. When mounting, it is possible to change the embedding position of each fixing bar without changing the mounting position of the plate material. For example, in the form of the above-described embedded metal, when one or all of the fixing bars interfere with the bar arrangement in the component member when trying to attach to the component member with one side of the plate member as the upper side In this case, the embedding position of each fixing bar is changed with the other side of the plate material as the upper side, the presence or absence of interference is checked again, and if there is no interference, the plate material posture can be set as the mounting posture. Further, in this interference check, if the fixing bar interferes with the bar arrangement or the like, the presence or absence of interference may be confirmed again with the other side as the upper side.

  As described above, according to the embedded metal of the present invention, the centroid position of the plate material and the centroid position of the shape formed at each fixing position of the plurality of fixing bars are simply shifted. Thus, it is possible to increase the possibility of avoiding interference between the embedded hardware and the reinforcing bars in the constituent members of the concrete building to which the embedded hardware is attached. Further, since the embedded metal has no unnecessary through-holes, it has the initial strength that the plate material itself has, and the mounting work efficiency at the site can be improved.

  Here, as an embodiment of the above-described embedded metal object, the shape of the plate member in a plan view is a square or a rectangle, and the shape that the four fixing rods can connect each fixing position is a square or a rectangle. The fixing rod is fixed to the plate so that the fixing rod is fixed between each side of the plate and the square or rectangular sides formed by the fixing positions of the four fixing rods. There are forms in which all four separation lengths are different.

  It is common to use an embedded metal product in which four fixing rods are fixed to one plate material. Further, the plate material having a square or rectangular shape is used. It is common.

  In the embedded metal of the above-described form, the four separation lengths between the sides of the plate material and the square or rectangular sides formed at the fixing positions of the four fixing bars are all different. Thereby, the variation of the plate material attachment attitude | position which can avoid interference with the reinforcing bar in a structural member, etc. can be diversified.

  Further, as another embodiment of the above-mentioned embedded metal object, the shape of the plate member in plan view is circular or substantially circular, and the four fixing rods can be connected to each fixing position in a square shape or An embedding object in which the fixing bar is fixed to the plate so as to be rectangular, and the edge of the plate from the center of each of the square or rectangular sides formed at the fixing positions of the four fixing bars There is a form in which all the shortest separation lengths are different.

  This form of the embedded metal is related to the case where the shape of the plate material is, for example, a circle and four fixing rods are used. For example, by making the respective separation lengths (the shortest separation lengths) between the center of each side of the rectangle formed at each fixing position of the four fixing rods arranged in a square and the end side of the circular plate material different from each other, As with the above-described embodiment, variations in the plate material mounting posture that can avoid bar arrangement can be varied.

  As still another embodiment of the embedded metal fixture using the four fixing rods, the four fixing rods include two fixing rods corresponding to two fixing rods. The U-shaped fixing member is composed of two straight portions and a connecting portion connecting them, and the connecting portion is fixed to the plate material, and a virtual straight line extending from the straight portion to the plate material is the plate. There is a form in which the position intersecting with the material corresponds to the fixing position of the fixing rod.

  For example, a U-shaped metal fitting (or a U-shaped fixing member) having a fixing plate or the like at the tip of a U-shaped elongated metal object is fixed to the plate material, thereby fixing the two wearing bars to the fixing rod. The anchoring effect can be expected, and the fixing efficiency is higher than that of fixing two pieces separately. Therefore, in the present embodiment, by using two U-shaped fixing members and fixing them to the plate material, the anchor effect substantially similar to that when four fixing rods are attached is expected. is there.

  Here, the U-shaped fixing member is formed by bending one elongated metal piece so that two linear portions and a connecting portion connecting them are continuously integrated, and the connecting portion is a plate material. It is fixed directly to the surface. More specifically, it is bent so that the end portion of the linear connecting portion forms a round (R) and moves to the linear portion. In this case, each linear part of the U-shaped fixing member is not directly fixed to the plate material. Therefore, in this embodiment, the position where the virtual straight line extending from the straight portion to the plate material intersects with the plate material is assumed to be the fixing position of the fixing rod, and the centroid position of the shape that can be formed at each assumed fixing position Is specified so that it is different from the centroid position of the plate material.

  Further, according to the present invention, there is provided a method of attaching an embedded metal object to a component of a concrete building for fixing a predetermined number of plate materials fixed to one side surface of the plate material having a predetermined shape in plan view. An embedded metal mounting method for mounting an embedded metal article comprising a bar material to a predetermined position in a component forming a concrete building, wherein the embedded metal object is obtained by fixing a plate material and a fixing bar material in advance. Is detected by rotating or rotating the plate so that the embedded object in the component and the fixing bar do not interfere with each other at a predetermined position of the component, and the embedded metal is detected with the found plate posture. The structural member is constructed by temporarily mounting and placing concrete, and an embedded metal is mounted in the structural member.

  As described above, by using the embedded metal fitting according to the present invention, this can be applied to a predetermined position (former frame or the like) at a temporary stage before placing concrete components (columns, walls, ceiling floors, etc.). When temporarily attaching to the bar arrangement etc.), it becomes easy to find a plate material posture that can avoid interference between the bar arrangement already installed and the fixing bar. Furthermore, the work of finding the avoidance posture is performed by an extremely simple method in which the worker who simply holds the plate material simply rotates or rotates the plate material at the installation location, so that there is no need for installation work. It is possible to realize installation work with high work efficiency. After the embedded hardware is temporarily attached, fresh concrete is placed in the mold, and after waiting for its hardening, components such as columns and walls to which the embedded hardware is attached are applied.

  As can be understood from the above description, according to the embedded metal fitting and the mounting method according to the present invention, the fixing rod and the component member can be obtained simply by rotating or rotating the embedded metal fitting at the attachment position. Accordingly, it is possible to find a plate material posture that does not interfere with the bar arrangement, and therefore, it is possible to realize the mounting work of the embedded metal fitting that is extremely efficient and has high mounting accuracy.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an embodiment of an embedded metal fitting of the present invention, and FIG. 2 is a rectangle formed by the centroid position of a plate material and four fixing rod fixing positions in the embedded metal fitting of FIG. It is a figure explaining the relationship with the centroid position. FIG. 3 is a perspective view of another embodiment of the embedded metal of the present invention, and FIG. 4 is a diagram showing the embedded metal of FIG. 3 at the centroid position of the plate material and the four fixing bar fixing positions. It is a figure explaining the relationship with the centroid position of a rectangle. FIG. 5 is a perspective view of still another embodiment of the embedded metal fitting according to the present invention, and FIG. 6 is a diagram for explaining a temporary attachment method of the embedded metal fitting shown in FIG. 5 at the construction stage of the reinforced concrete column. FIG. 7 is a diagram illustrating a state in which the embedded metal of FIG. 5 is attached to a reinforced concrete column and a steel material is welded to the embedded metal. Needless to say, the shape of the plate material, the number of fixing rods, the manner of fixing to the plate material (shape formed at the fixing position) and the like are not limited to the illustrated embodiment.

  FIG. 1 shows an embodiment of an embedded metal fitting according to the present invention. This embedded metal 10 is formed by welding four SUS fixing rods 2... To one side 11 of the plate material 1 made of SUS and having a rectangular plan view. . The fixing bar 2 is composed of a round bar anchor bar 21 and a fixing plate 22 fixed in the vicinity of its tip.

  One side surface 11 of the embedded metal 10 and the fixing bar 2,... Are embedded and fixed in a concrete building (not shown) such as concrete constituting a pillar, a wall, a ceiling floor, etc. It faces the surface of the component, and piping, steel, etc. are welded to the other side surface 12.

  FIG. 2 shows, in the embedded metal object 10, the centroid position P 0 of the plate material 1 with long and short sides L 1 and L 2 and the fixing positions Q 1 and 4 of the four fixing rods 2 to the plate material 1. It is the figure explaining the relationship with rectangular centroid position: P1 which can be formed by Q2, Q3 and Q4.

  As shown in the figure, the centroid positions P0, P1 are set so as to be shifted from each other, and further to each side of the rectangle formed by the fixing positions Q1, Q2, Q3, Q4 and each side of the plate material 1. The four separation lengths are different at t1, t2, t3, and t4, respectively.

  When the above-described embedded metal fitting 10 is temporarily attached to the component member, it is confirmed whether or not each fixing bar 2,... Interferes with the bar arrangement in the component member in the plate material posture shown in FIG. In the case of interference, for example, the centroid position P0 is fixed, the plate material 1 is rotated 90 degrees around the centroid position, and in this state, the fixing rods 2,. Check for the presence of muscle interference.

  When any one of the four straight edges is set as the upper side or the lower side, the plate material 1 can be shifted by 90 degrees and the presence or absence of interference can be confirmed each time. It becomes possible to search for a posture without interference.

  FIG. 3 shows an embedded metal 10A having four fixing rods 2,... Having the same arrangement as the plate material 1A having a circular outer shape and the embedded metal 10.

  FIG. 4 shows a rectangular figure formed by the centroid position: P0 ′ of the plate material 1A and the fixing positions Q1, Q2, Q3, Q4 of the four fixing rods 2,. It is a figure explaining the relationship with heart position: P1 '. As shown in the figure, the centroid positions P0 ′ and P1 ′ are adjusted so as to be shifted from each other, and further, the midpoint of each side of the rectangle formed by the fixing positions Q1, Q2, Q3, and Q4: Q12 , Q23, Q34, Q14 and the shortest separation length from the outer edge of the plate material 1A: t1 ′, t2 ′, t3 ′, t4 ′ are all different.

  In the embedded metal 10A, the plate material 1A is rotated or rotated around the centroid position P0 ′, so that the fixing rods 2,... It is possible to check whether there is any interference with the bar arrangement.

  FIG. 5 shows an embedded metal fixture 10B formed by welding two U-shaped fixing members 2A and 2A to one side surface 11 of the plate material 1.

  The U-shaped fixing member 2A is formed by bending one SUS elongated member into a single piece, and the two straight portions 23 and 23 and the connecting portion 24 connecting them are continuously integrated. The connecting portion 24 is welded to the plate material 1. Note that the fixing plate 22 is also fixed in the vicinity of the tip of the straight line portion 23 serving as an anchor line.

  In the figure, the straight line portion 23 is not directly fixed to the plate material 1. Therefore, in this embedded metal fixture 10B, the virtual straight lines V1, V2, V3, V4 are drawn from the four straight portions 23,... The centroid position is determined as corresponding to the positions Q1, Q2, Q3, and Q4.

  Since this embedded metal 10B is formed simply by welding the connecting portions 24, 24 of the two U-shaped fixing members 2A, 2A at a predetermined position, its manufacturing efficiency is higher than that of the embedded metal 10. Becomes higher.

  Next, a method for temporarily attaching the embedded metal fitting 10B to a predetermined position of a reinforced concrete column will be briefly described with reference to FIG.

  In FIG. 6, the main reinforcing bars S1,... Constituting the pillar and extending in the vertical direction are arranged, the hoops S2,... Surrounding the main reinforcing bars S1,. The situation where the formwork F to be attached is installed is shown.

  For example, the position of the centroid position of the embedded metal 10B on the surface of the mold F is marked based on the survey result, and a worker (not shown) sets the centroid position of the embedded metal 10B at this position. Then, the embedded metal fixture 10B is rotated (X direction) to find a plate material posture in which the U-shaped fixing members 2A and 2A do not interfere with the bar arrangement.

  The embedded metal 10B is temporarily attached to the mold F in the found plate material posture.

  All the formwork is attached around the main reinforcing bars S1, ... of the column, and fresh concrete is placed in the formwork in a posture in which the formwork is supported by the support work.

  FIG. 7 shows a state in which the fresh concrete is hardened to exhibit a predetermined strength and the other side of the plate material 1 faces the surface of the column C formed by removing the mold.

As shown in the figure, the end portion of the steel mold M is welded to the plate material 1, and the windshield wall (not shown) is supported by the steel mold M.

  By using the embedded hardware 10, 10A, 10B, it is possible to easily confirm whether or not there is any interference between the fixing bar and the reinforcing bar in the structural member when attaching to the structural member forming the concrete building. Can be attached to the component members in a posture that does not interfere with the components.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

It is a perspective view of one embodiment of an embedded metal object of the present invention. FIG. 2 is a diagram for explaining a relationship between a centroid position of a plate material and a rectangular centroid position formed by four fixing rod fixing positions in the embedded metal of FIG. 1. It is a perspective view of other embodiments of an embedded metal object of the present invention. FIG. 4 is a diagram illustrating a relationship between a centroid position of a plate material and a rectangular centroid position formed by four fixing rod fixing positions in the embedded metal of FIG. 3. It is a perspective view of other embodiment of the embedded metal fitting of this invention. It is the figure explaining the temporary attachment method of the embedded metal fitting of FIG. 5 in the construction stage of the reinforced concrete structure pillar. FIG. 6 is a diagram illustrating a state in which the embedded metal of FIG. 5 is attached to a reinforced concrete column and a steel material is welded thereto.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A ... Plate material, 11 ... One side surface, 12 ... Other side surface, 2 ... Fixing bar, 2A ... U-type fixing member, 21 ... Anchor reinforcement, 22 ... Supporting plate, 23 ... Straight part, 24 ... Connecting part 10, 10A, 10B: embedded metal, Q1, Q2, Q3, Q4: fixing position, V1, V2, V3, V4 ... virtual straight line, P0, P0 '... centroid position of plate material, P1, P1' ... Rectangular centroid position formed at the fixing position of the fixing bar, F ... formwork, S1 ... main reinforcement, S2 ... hoop reinforcement, C ... reinforced concrete column, M ... steel

Claims (5)

An embedded metal to be embedded at a predetermined position in a component forming a concrete building, and the embedded metal is fixed to a plate material having a predetermined shape in plan view and one side surface of the plate material. And a predetermined number of plate material fixing rods,
The centroid position of the one side surface of the plate material is shifted from the centroid position of a polygon that can connect each fixing position of the predetermined number of fixing rods to the plate material. , Embedded hardware. The plate member has a square shape or a rectangular shape in plan view, and the fixing rod member is fixed to the plate member so that the four fixing rod members can be connected to each fixing position in a square or rectangular shape. In case
The four separation lengths between each side of the plate material and each of the square or rectangular sides formed at the fixing positions of the four fixing rods are all different. Embedded hardware. The plate member has a circular or substantially circular shape in plan view, and the fixing rods are fixed to the plate member so that the four fixing rods can be connected to each fixing position in a square or rectangular shape. When
2. The embedding according to claim 1, wherein the shortest separation lengths from the center of each side of the square or rectangle formed at the fixing positions of the four fixing rods to the edge of the plate material are all different. Inclusion. The four fixing rods are composed of two U-shaped fixing members composed of two linear portions corresponding to the two fixing rods and a connecting portion connecting them, and the connecting portion is the plate. It is fixed to the material,
The embedded metal fitting according to claim 2 or 3, wherein a position where an imaginary straight line extending from the straight portion to the plate material intersects the plate material corresponds to a fixing position of the fixing rod. A predetermined member in a structural member that forms a concrete building with an embedded metal plate composed of a plate material having a predetermined shape in plan view and a predetermined number of plate material fixing bars fixed to one side surface of the wide plate material. A mounting method of an embedded metal to be attached to a position,
The embedded material according to any one of claims 1 to 4, wherein the plate member and the fixing bar material are fixed in advance, and the embedded object in the component member and the fixing rod material interfere at a predetermined position of the component member. Rotate or turn the plate to find the plate position that is not to be installed, temporarily install the embedded metal in the found plate position, construct the component by placing concrete, and embed it in the component A method of attaching an embedded metal, characterized by attaching a hardware.

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