JP2008285832A - Anchor metal fitting, autoclaved lightweight concrete panel, method of lifting autoclaved lightweight concrete panel, and method of mounting autoclaved lightweight concrete panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means capable of lifting a finished panel without damaging the finished surface and preventing mounting bolts from being cracked by concentrated load when the finished panel is installed in a restricted area and also capable of drastically lowering a mounting cost for an ALC (autoclaved lightweight concrete) panel by saving labor for installing mounting nuts and lifting nuts. <P>SOLUTION: This anchor metal fitting for lifting buried in an autoclaved lightweight concrete panel is formed in an L-shape in cross section having a horizonal surface and a vertical surface. The horizontal surface has a nut having a through hole at the generally center part, overlapped with the through hole, and opened in the direction perpendicular to the horizontal surface. The vertical surface has a long nut extending in the direction perpendicular to the vertical surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a method for mounting a lightweight cellular concrete panel, and more particularly, anchor metal fittings for suspending lightweight cellular concrete panels, lightweight cellular concrete panels embedded with anchor metals, and a method and method for lifting the lightweight cellular concrete panels. Regarding the method.

Conventionally, for example, when a wall is constructed by attaching an outer wall panel of a lightweight cellular concrete panel (hereinafter referred to as “ALC panel”) to a building frame, a long hole is provided on the small face at the construction site, and the wall is attached to the long hole. Insert the anchor. Next, a bolt insertion hole orthogonal to the long hole is provided from the indoor side surface of the panel, and the mounting anchor and the bolt are screwed and attached to the structural frame using a dedicated hardware.
In addition, when high proof stress is required, or when it is desired to omit perforation in the small facet, an ALC panel in which an anchor for mounting is embedded in advance is prepared. Bolt insertion holes that reach the metal fittings are provided, the embedded anchor metal fittings and bolts are screwed, and similarly, they are attached to the structural frame using dedicated hardware.

  On the other hand, conventionally, when attaching an ALC panel to a steel frame of a building, there is a lifting method using a nylon sling 20 as shown in FIG. 6. In this lifting method using a nylon sling, the nylon sling 20 is wound around the ALC panel 5. At the same time, there is work to raise the ALC panel manually, which is a labor load, especially when lifting the finished panel used for the outer wall of narrow land, the finished surface is damaged by nylon sling, and the finishing performance is improved. There is a difficulty of losing.

As another method, there is a lifting method using a pipe anchor 21 for attachment as shown in FIG. 7 (see, for example, Patent Document 1). FIG. 7A is an external perspective view of a suspended ALC panel, and FIG. 7B is a diagram illustrating a method of lifting the ALC panel.
In this method, a pipe anchor 21 for attachment is embedded in advance inside the ALC panel. That is, a hole communicating with the inside of the ALC panel is formed in one short side edge 5a and one flat surface 5b of the ALC panel body, and from the hole provided in the short side edge 5a, A pipe anchor 21 having a screw hole is inserted into one of the ends. Next, a panel mounting bolt 22 is inserted from a hole provided in one flat surface 5b of the ALC panel, and is screwed into a screw hole provided in the central portion of the pipe anchor 21, and the panel mounting bolt 22 is tightened. The panel mounting bracket 23 is fixed to the ALC panel body 5.

Next, the eyebolt 24 is inserted from the short side edge 5 a and screwed into the screw hole of the pipe anchor 21. Next, a shackle 25 having a lifting wire 26 inserted through the eyebolt 24 is attached. After preparing for lifting in this way, the ALC panel 5 is lifted by the lifting wire 26.
FIG. 7B is a diagram showing a cross section of FIG. 7A and is a diagram for explaining a method of lifting the ALC panel. As shown in the figure, a pipe anchor 21 is embedded in the center of the ALC panel 5, and a panel mounting bracket 23 is attached to one flat surface 5 b of the ALC panel 5 via a panel mounting bolt 22. An eyebolt 24 is inserted from the upper short side edge 5 a of the ALC panel 5 and screwed into the screw hole of the pipe anchor 21. Next, the shackle 25 having the lifting wire 26 inserted through the eyebolt 24 is attached, and the ALC panel 5 is lifted by the lifting wire 26.

After the ALC panel is suspended to a predetermined position on the construction site and fixed in this way, the shackle and the lifting wire are sequentially removed, and finally the eyebolt is removed. At this time, the pipe anchor is left in the ALC panel body, and the mounting bracket is fixed to the panel. In this way, a lightweight cellular concrete panel is attached and constructed by lifting and fixing necessary ALC panels sequentially to a predetermined position.
JP 2006-322207 A

However, this method also has the following problems. In other words, the use of pipe anchors and eyebolts has the effect of preventing the finish from being damaged, but in this case, the panel's own weight is concentrated on the bolts screwed to the mounting anchors, so cracks start from the bolts. There is a difficulty that it is likely to occur.
The present invention solves the above-mentioned difficulties, and in the construction of a finished panel in a narrow area, it can be lifted without damaging the finished surface, and it can prevent cracks due to concentrated loads on the mounting bolts, It is an object of the present invention to provide a means that can save labor for installing a mounting nut and a lifting nut and can dramatically reduce the mounting cost of an ALC panel.

In order to solve the above problems, in the present invention, the cross section has an L-shape having a horizontal plane and a vertical plane, and the horizontal plane has a through hole at substantially the center thereof, and overlaps the through hole in a direction perpendicular to the horizontal plane. An anchor fitting for hanging a lightweight cellular concrete panel having an open nut and a long nut extending in a direction perpendicular to the vertical surface was adopted on the vertical surface.
The lightweight cellular concrete panel of the present invention is a lightweight cellular concrete panel having a reinforcing reinforcing bar and a hanging anchor metal fitting embedded therein, and a part of the anchor metal fitting according to claim 1 on the reinforcing steel reinforcing bar. Is fixed by welding, and the nut and the long nut of the anchor metal fitting are embedded so as to be perpendicular to the edge and the flat surface of either one of the lightweight cellular concrete panel, respectively. It was.
In the lightweight cellular concrete panel of the present invention, the nut and the long nut of the anchor metal fitting for suspending the lightweight cellular concrete panel are respectively open to one end face and a plane of the lightweight cellular concrete panel. preferable.

The method of lifting a lightweight cellular concrete panel according to the present invention is a lightweight system in which an eyebolt is screwed and tightened to a nut of an anchor fitting embedded in the lightweight cellular concrete panel described above, and a wire is hung on the eyebolt through a shackle. Adopted the method of lifting cellular concrete panels.
In addition, the lightweight cellular concrete panel mounting method of the present invention is the above-described lightweight cellular concrete panel, wherein the panel mounting bracket is fastened to the long nut of the anchor bracket embedded in the lightweight cellular concrete panel described above using a fastening bolt, and then the lightweight cellular concrete panel. Is lifted to a predetermined position by the above lifting method, and the lightweight cellular concrete panel is mounted by welding and fixing the panel mounting bracket to a ruler angle for panel mounting.

  According to the anchor fitting according to the present invention, it is possible to lift a finished panel without damaging the finished surface in the construction of a finished panel in a narrow space, and not only can prevent cracking due to concentrated load on the mounting bolt. By using an anchor fitting that has both a mounting nut and a lifting nut, it is possible to save both labor and installation costs, so that the cost can be dramatically reduced.

Embodiments of the present invention will be described below with reference to the drawings.
First, the anchor fitting will be described.
FIG. 1 is an external perspective view of the anchor fitting of the present invention, and FIG. 2 is a cross-sectional view. The anchor fitting 3 of the present invention is, for example, an L-shape having a thickness of 2.3 mm and a cross-section of about 50 mm × 80 mm, a length of about 140 mm, and a diameter of about 13 mm near the center of the horizontal plane 3a. A through hole 8 is provided, and a lifting nut 7 of M12 is welded and fixed to the upper surface of the horizontal surface 3a so as to overlap the through hole 8. Further, a mounting long nut 6 of about M12 is welded and fixed to the approximate center of the vertical surface 3b. Therefore, the lifting nut 7 and the mounting long nut 6 are open at right angles to each other.
Here, the dimension of the anchor metal fitting and the size of the nut are not limited to the above example, and may be appropriately selected according to the size of the ALC panel.

Next, a method for manufacturing an ALC panel by embedding the anchor fitting together with a reinforcing steel bar in an ALC panel base material will be described.
FIG. 3 is a cross-sectional view showing the structure of the ALC panel of the present invention.
First, a plurality of reinforcing reinforcing bars 4 are arranged so as to intersect in the longitudinal direction and the width direction of the ALC panel, and a lattice-shaped reinforcing bar mat is manufactured by welding the intersecting portions, and the two reinforcing bar mats are spaced at a predetermined interval. Place them to face each other and connect them with a spacer (not shown) to make a reinforcing bar.

Next, the outer surface of the vertical surface 3b of the anchor fitting 3 is brought into contact with the outdoor reinforcing reinforcing bar 4a, and the portion in contact with the reinforcing reinforcing bar 4a is welded to fix the anchor fitting 3 to the reinforcing reinforcing bar 4. At this time, the anchor fitting 3 is installed at the center position of the upper width of the ALC panel 5. With respect to the length direction, for example, the upper opening of the lifting nut 7 is positioned at a position about 10 mm from the short side edge 5a. Further, in the thickness direction, the tip of the mounting long nut 6 is positioned at a position of about 10 mm from the surface 5c of the ALC panel 5.
At this time, a cylindrical foam plug is inserted into the opening at the tip of the mounting long nut 6 and the opening at the tip of the lifting nut 7, and the ALC slurry, which will be described later, is attached to the mounting long nut 6 and the lifting nut. The filling of the nut 7 and the through-hole 8 is prevented.

  In this way, by inserting the cylindrical foam plug into the opening at the tip of the lifting nut 7 and the opening at the tip of the mounting long nut 6, the drilling position and punching range can be easily determined. Therefore, the subsequent squeezing operation can be greatly reduced.

  Next, a plurality of reinforcing bar rods with anchor fittings are set in the formwork, and ALC slurry is injected, and a reinforcing reinforcing bar mat with anchor fittings is embedded in the ALC base material and solidified. Then, after the ALC base material slurry is semi-cured, the ALC base material is cut into a predetermined thickness, and further cured by autoclave, whereby the ALC panel 1 in which the reinforcing reinforcing bars and anchor fittings of the present invention shown in FIG. 3 are embedded. Is obtained.

The ALC panel manufactured as described above is lifted to a predetermined position of the building and attached to the building frame.
FIG. 4 is an external perspective view of a dedicated mounting hardware used in the present invention.
The dedicated mounting hardware 11 has a substantially upper half divided into a vertical portion 12 and a horizontal portion 13 and is bent into a T-shaped cross section, and has a long hole 15 at the center of the lower half vertical portion 12. The steel plate is cut out and bent to form. The central elongated hole 15 is for inserting a mounting bolt, and may be a slit.
The horizontal portion 13 is provided with an opening 14 through which an eyebolt for lifting the ALC panel passes.

FIG. 5 is a cross-sectional view showing a state in which the ALC panel is lifted and attached to the building frame.
First, as shown in FIG. 5, the mounting bolt insertion hole 9 is drilled to a predetermined size from the indoor surface 1c of the ALC panel 1 according to the present invention until it reaches the long nut 6 for mounting the anchor fitting 3. Next, a mounting bolt 10 for fixing the dedicated mounting bracket 11 is embedded in the ALC panel 1 through a long hole 15 provided in the vertical surface 12 of the dedicated mounting hardware 11 that also serves as a weight receiver. The dedicated mounting hardware 11 is fixed to the ALC panel 1 by screwing and tightening to the mounting long nut 6.

Further, an eyebolt insertion hole 16 having a predetermined size is drilled from the small edge surface 1 a at the top of the ALC panel 1 until reaching the lifting nut 7 of the anchor fitting 3.
Next, the eye bolt 24 for lifting the ALC panel is passed through the opening 14 of the horizontal surface 13 of the dedicated mounting hardware 11 and screwed into the lifting nut 7 to be tightened. From this state, a wire is hung on the eyebolt 24 via a shackle, and the eyebolt 24 is lifted to a predetermined position. After the dedicated mounting hardware 11 is brought into contact with the base angle 18 for mounting the ALC panel provided on the structural housing 17, both are welded and fixed. After installation, the lifting eyebolt 24 is removed. The anchor fitting 3 remains in the ALC panel.
In this manner, a predetermined ALC panel is sequentially lifted and fixed to the base angle 18 to construct and build the wall structure of the building.

  Thus, if the ALC panel is lifted using the anchor fitting of the present invention and fixed at a predetermined position, it can be lifted without damaging the finished surface of the panel in construction in a narrow area, and the mounting bolt In addition to preventing cracks due to concentrated loads on the arm, the use of anchor brackets that have both mounting nuts and lifting nuts saves labor for both installations, dramatically reducing costs. Is possible.

It is a perspective view of the anchor metal fitting of the embodiment concerning the present invention. It is sectional drawing of the anchor metal fitting of embodiment which concerns on this invention. It is sectional drawing of the ALC panel which embed | buried the reinforcing bar and anchor metal fitting of this invention. It is an external appearance perspective view of the exclusive attachment hardware used by this invention. It is sectional drawing which shows the state which lifts and attaches the ALC panel of this invention to a building frame. It is a figure which shows an example of the lifting method of the conventional ALC panel. It is a figure which shows the other example of the lifting method of the conventional ALC panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforcement bar and ALC panel which embedded anchor metal fittings 3 Anchor metal fittings 4 Reinforcement reinforcement 5 Lightweight cellular concrete panel 6 Installation long nut 7 Lifting nut 8 Through-hole 9 Installation bolt insertion hole 10 Installation bolt 11 Dedicated attachment metal 12 Vertical surface 13 Horizontal plane 14 Opening 15 Long hole 16 Eye bolt insertion hole 17 Structure housing 18 Base angle 20 Nylon sling 21 Pipe anchor 22 Panel mounting bolt 23 Panel mounting bracket 24 Lifting eye bolt 25 Shackle 26 Wire

Claims (5)

  An anchor fitting embedded in a lightweight cellular concrete panel having a L-shaped cross section having a horizontal plane and a vertical plane. The horizontal plane has a through hole at substantially the center thereof and overlaps the through hole. An anchor fitting for hanging a lightweight cellular concrete panel, comprising: a nut that opens in a direction perpendicular to the vertical plane; and a long nut that extends in a direction perpendicular to the vertical plane on the vertical plane.   A lightweight cellular concrete panel having a reinforcing reinforcing bar and a hanging anchor fitting embedded therein, wherein a part of the anchor fitting according to claim 1 is welded and fixed to the reinforcing reinforcing bar. A lightweight cellular concrete panel, wherein a nut and a long nut are respectively embedded so as to be perpendicular to a small edge and a plane of one of the lightweight cellular concrete panels.   The lightweight lightweight concrete panel according to claim 2, wherein a nut and a long nut of the anchor metal fitting for suspending the lightweight cellular concrete panel are opened to one end face and a plane of the lightweight cellular concrete panel, respectively. Aerated concrete panel.   A lightweight cellular concrete characterized in that an eyebolt is screwed into a nut of an anchor metal fitting embedded in the lightweight cellular concrete panel according to claim 2 or 3 and tightened, and a wire is hung on the eyebolt through a shackle. Panel lifting method.   A panel mounting bracket is fastened to a long nut of an anchor bracket embedded in the lightweight cellular concrete panel according to claim 2 or 3 using a fastening bolt, and then the lightweight cellular concrete panel is lifted according to claim 4. A method for attaching a lightweight cellular concrete panel, wherein the panel mounting bracket is welded and fixed to a ruler angle for panel installation by lifting the panel to a predetermined position.