JPS5821014A - Method of burying insert clamping tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides insert fasteners such as insert bolts and insert nuts used for joining ALC (autoclaved lightweight concrete) panels, GRC (glass fiber reinforced cement) panels, etc. ALC and G
Regarding embedding method in RC panel.

Conventionally, the method of embedding this type of insert fastener is to
A pilot hole is drilled in the LC+GRC panel using a drilling machine, and the panel is installed and fixed by driving a bolt or nut into the pilot hole, which is cumbersome and has poor workability, and is not effective in preventing removal. It has drawbacks such as being dim.

This invention method was developed in view of the above-mentioned conventional drawbacks, and the purpose is to provide a method for embedding an insert fastener that can be expected to have a large pull-out prevention effect as well as simplify the installation work and improve workability. shall be.

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows the insert fastener (A) used in this invention.
FIG. 10 shows an example in which an insert nut is used as the insert fastener. In the same figure, (1) is a box nut, (2) is a spacer, (3) is a box nut, and (2) is a spacer. ) is a fixing bolt, and (4) is an expandable connecting member. The tightening member (1) and the spacer (2) are arranged facing each other on the same axis, and a hole is drilled in the center of the spacer (2). Through-hole Q! →The fixing bolt (3
) is screwed into the screw hole (la) of the tightening member (1).

The expandable connecting member (4) (see Figure 1q) is a cylindrical member with a plurality of cuts (gaps) (5) formed in the axial direction at predetermined intervals in the circumferential direction, and (]) and the spacer (2), and both ends (4a),
L411> is joined to the opposing surfaces of the tightening member (1) and the spacer (2) by an appropriate means such as welding to connect the tightening member (1) and the spacer (2), and the center portion ( 4C) is formed to have a somewhat thin wall shape and bulge in the radially outward direction, thereby providing expandability in the radially outward direction.

On the other hand, when an insert bolt is used as the insert fastener (A), it is constructed as shown in FIG. 1(b).

In the figure, (1) is a tightening member that is an insert bolt, (2) is a spacer, and (4) is an expandable connecting member. The leg portion α of the tightening member (1) is inserted into the opposite side, one end (4a) of the expandable connecting member (4) is placed on the opposing surface of the spacer (2), and the other end (41jl is ) to connect the tightening member (1) and the spacer (2).

The insert fastener (A) having the above configuration is tightened from the surface of the panel to the place where it is necessary to bury the concrete panel (6) such as ALC or GRC in a flexible state before hardening, that is, in a semi-hardened state. Insert the spacer (
2) is left above the panel and embedded (see FIGS. 2(a) and 3(a)).

FIGS. 2(a) and (b) are explanatory views when the tightening member (1) is an insert nut, and FIGS. 3(a) and (b) are explanatory views when the tightening member (1) is an insert bolt.

As shown in Figure 2 (a) and Figure 3 (→), insert
1 Fastener (A) to concrete panel (6)
After curing and curing the concrete panel (6) in a semi-buried state to advance the degree of hardening of the concrete panel (6) and fix the tightening member (1) to the concrete panel (6), the fixing bolt (3) and the tightening member are At the same time, the leg α cut of (1) is fixed to prevent the tightening member (1) from sinking, and at the same time, the spacer (2) is held by the holding member (
8), press the panel from above and push it down in the direction of arrow C to embed the spacer (2) in the concrete panel (6) and bring it close to the tightening member (1), as shown in Figure 2 (
1)) and the insert state as shown in FIG. 3(b).

Along with this proximal axis movement, the cylindrical expandable connecting member (
A pull-out stopper burr (7) is formed inside the concrete-based panel (6) by expanding the central portion αC) of 4) in the radial outward direction.

Note that even if the expandable connecting member (4) has a configuration K in which both the upper and lower end portions G4aD, (4b11) are continuous in the circumferential direction as shown in FIG. 1(C), The same effect as shown in t)) is obtained in which both ends (4a) and the Q-shape are not continuous in the circumferential direction.

As described above, the method for embedding an insert fastener according to the present invention is to embed the fastener connected with the expandable connecting member into the concrete panel while leaving the spacer of the fastener when the concrete panel is semi-hardened. (When the flannel hardens, use the holding member to push the spacer into the ζ flannel so that the tightening member and spacer are close to each other, and at this time, expand the expandable connecting member to prevent it from coming out.) Since this is a method of burying the insert fasteners that make up the reusable part, the installation work is easier and more workable than the conventional method of installing insert fasteners, and it is possible to bury the insert fasteners that make up the reuse part. Since a retaining burr is formed, an insert fastener having an excellent retaining effect can be attached to a concrete panel.

[Brief explanation of the drawing]

Figures 1(a) and (1)) are external views of the insert fastener used in the method of this invention, and Figure 1(C) is another embodiment of the expandable connecting member constituting the insert fastener. 2(a), (b) and FIG. 3(a), (b) are explanatory diagrams of the invention method. (1)...Tightening member (2)...Spacer (4)
... Expandable connecting member (6) ... Concrete type
Channel (7)... Barge part for stopping removal (8)... Holding member (C) 4C (0) No. (0) 11 giE3 Figures (a) (b)

Claims (1)

[Claims] (1) Cuts with a predetermined interval in the circumferential direction from the panel surface where insert fasteners are required to be buried when the concrete panel is semi-cured, to the opposing surfaces of the fastening member and spacer, which face each other on the same axis. An insert fastener connected by an expandable connecting member formed in the axial direction is buried leaving the spacer above the panel surface, and after further hardening the concrete panel in this buried state, it is inserted above the spacer. Push the spacer into the concrete panel using a holding member to bring the spacer and the fastening member close together, and when pushing the spacer, expand the expandable connecting member radially outward to create a burr to prevent removal. A method for embedding an insert fastener, characterized in that the insert fastener is formed into a shape.