JPH02285133A - Embedding metal for molding panel - Google Patents

Abstract

PURPOSE:To increase strength of a panel and to prevent the occurrence of damage by a method wherein the flange parts of anchor metals approximately in an L-shape in cross section are positioned facing each other, and an insert metal is embedded between the opposing flange parts and in concrete in a molding panel. CONSTITUTION:The flange parts of anchor metals 2 and 2 formed in an L-shape in cross section are embedded in concrete in a molding panel 1 in a manner to be positioned facing each other. Further, the flange parts in a vertical and a horizontal direction of the anchor metals 2 an 2 are welded to reinforcing bars 4 in the concrete in the molding panel 1 for reinforcement. Thereafter, an insert metal 3 is securely welded between the flange parts in a vertical direction of the anchor metals 2 and 2. This constitution enables simple and reliable mounting of the insert metal 3 between the flange parts in a vertical direction of the anchor metals 2; and permits improvement of durability of the insert metal.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a molded panel embedding fitting for fixing insert fittings such as insert nuts and stud bolts in the concrete of a formed panel such as a precast concrete board. It is.

[Prior art]

In general, insert metal fittings such as insert nuts and stud bolts are often embedded in formed panels such as precast concrete plates.

Most of these types of metal inserts are generally fixed by welding to reinforcing bars arranged in the concrete of the formed panel.

Furthermore, if necessary, an anchor plate or anchor reinforcing bar may be welded to the insert fitting for the purpose of increasing the fixing strength of the insert fitting.

In such cases, the metal insert is often welded to a reinforcing bar on one side, or an anchor plate or an anchor reinforcing bar is welded to only one side.

[Problem to be solved by the invention]

However, with this mounting method, when an external force is applied to the insert fitting to pull it out, a rotational force centered around the attachment part of the insert fitting is generated, so a relatively small external force is generated on the insert fitting. Even if the bending force is applied, the metal insert is subjected to a large bending force, resulting in an extremely disadvantageous mechanical condition.

Furthermore, only one metal insert is buried in each location.

Therefore, when attaching a molded panel to a building structure as a wall panel using fasteners, the fastener is supported at one point, so the mounting condition of the fastener is greatly influenced by the quality of the surface accuracy of the panel. .

In addition, even after installation, if force is applied to a part of the fastener due to the weight of the panel, wind pressure, seismic force, etc., rotational force will be applied in the in-plane direction and out-of-plane direction using the mounting part as a fulcrum, and due to this effect, In the unlikely event that an external force exceeding the allowable proof stress is applied to the mounting portion, the fastener mounting portion may become loose and the panel itself surrounding the mounting portion may be damaged.

Furthermore, there is a possibility that the buried portion of the insert fitting may be easily destroyed by receiving an excessive external force such as a gust of wind or an earthquake, and it can be said that the structure is extremely insufficient in terms of strength.

This invention was proposed in order to solve these strength problems, and it is a molded panel embedding material that can reliably and firmly install insert fittings such as insert nuts and stud bolts into the concrete of the molded panel. The purpose is to provide fittings.

[Means to solve the problem]

This invention relates to a molded panel embedded metal fitting for fixing insert fittings such as insert nuts and stud bolts in the concrete of a formed panel such as a precast concrete plate, and the cross-sectional abbreviation from the vertical flange portion and the horizontal flange portion. The above object is achieved by arranging the vertical flanges of the vertical flanges of the anchor fittings formed in the shape of a shape to face each other, and installing an insert fitting between the opposing vertical flanges.

〔Example〕

The present invention will be explained below with reference to an illustrated embodiment.

Two anchor fittings 2 in the concrete of the formed panel 1
．． 2 is buried, and insert fittings 3, 3 (hereinafter referred to as insert nuts 3) are attached to the anchor fitting 2.2 by welding.

The anchor fitting 2.2 has a vertical flange portion 2a and a horizontal flange portion 2b, and has an oval shape in cross section.

A plurality of holes 2c are provided in the horizontal flange portion 2b so that the back side of the horizontal flange portion 2b can be sufficiently filled with concrete.
, 2c are formed.

The anchor fittings 2, 2 have horizontal flanges 2b, 2b attached to the reinforcing bars 4 between a plurality of reinforcing bars 4 arranged in the concrete of the formed panel l, and a vertical flange part' 2a.

2a are placed facing each other.

The anchor fittings 2.2 are horizontal flange portions 2b, 2.
b are respectively fixed by welding them to reinforcing reinforcing bars 4.

The insert nut 3 is installed between the vertical flange parts 2a, 2a of the anchor fittings 2, 2, and the vertical flange part 2
It is fixed by welding to a and 2a.

In addition, the insert nut 3.3 is connected to the vertical flange portions 2a, 2.
You can attach two pieces like this between a, or three or four pieces if necessary. It is recommended to install two or more.)

In such a configuration, even if an external force is applied to the insert nut 3゜3 to pull it out, the anchor fitting 2.2
are installed on both sides of insert nut 3.3,
The external force is distributed to the anchor fittings on both sides in a well-balanced manner. Therefore, no rotational force due to external force is generated in the insert nut 3.3, and the buried portion of the insert nut 3.3 can be expected to have a considerable strength.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

■ Insert fittings such as insert nuts can be installed reliably, firmly, and extremely easily by welding between opposing vertical flanges of anchor fittings.

In addition, since the external force acting on the insert metal fitting is almost equally distributed to the left and right anchor metal fittings, there is no concern that mechanically disadvantageous rotational force will be generated in the insert metal fitting, and the strength of the insert metal fitting is extremely high.

■ Furthermore, when attaching a molded panel to a building structure as a wall panel using fasteners, if two or more inserts are installed between the vertical flanges as necessary, the fasteners can be supported at two points. As a result, the installation condition is also stable.

Therefore, even if the smoothness of the base surface is somewhat poor, the fastener will not wobble.

Furthermore, since the fastener is fixed at two points against its own weight and external force after installation, there is no risk of the bolt loosening due to rotational force.

Furthermore, the bending resistance against external bending force applied to the panel becomes extremely large.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention, in which FIG. 1 is a perspective view of a molded panel showing the mounting state of the embedded fittings, FIG. 2 is a partially enlarged cross-sectional view thereof, FIG. 3 is a plan view of the embedded metal fitting, and FIGS. 4 and 5 are side views of the embedded metal fitting. 1... Molded panel, 2... Anchor metal fittings, 2a...
・Vertical flange portion, 2b...Horizontal flange portion, 2c・
... Hole, 3... Insert nut, 4... Reinforcement bar. Patent applicant: Asahi Kasei Industries, Ltd. Figure 1 Figure 3 Figure 4 Figure 2 Figure 5

Claims (1)

[Claims] (1) Cross section approximately L from the vertical flange part and horizontal flange part
An embedded fitting for a molded panel, characterized in that the vertical flanges of the vertical flanges of the anchor fittings formed in a letter shape are placed opposite each other, and an insert fitting is installed between the opposing vertical flanges.