JPH0522564Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an anchor, and particularly to an anchor used in a wall of a soft porous material such as foamed concrete (hereinafter referred to as ALC).

[Problems that conventional technology and ideas try to solve]

As a conventional anchor of this type,
No. 12807 is known, and this anchor has a nut tightly fitted into a cylindrical anchor body having two driving legs.
After driving the anchor into the ALC, etc., when the bolt screwed into the nut swings due to vibration from the outside, the anchor body swings accordingly, creating a gap between the driving leg and the ALC. This caused the problem that the pulling force suddenly decreased and the anchor pulled out.

The object of the present invention is to provide an anchor that can be easily manufactured and that can maintain a strong initial pulling force even when the object to which it is attached swings (vibrates).

[Means to solve the problem]

The anchor of the present invention consists of a pair of flat strips with a through hole in the center, whose central parts intersect and overlap in a cross shape, and which are bent into a U-shape at the central part, forming a rectangular tube that opens toward the tip. Four plate leg pieces are formed, and a plate-shaped nut is swingably fitted into a recessed inner surface formed between the base end portions of the four plate leg pieces and the above-mentioned central portion. the inner diameter of the through hole,
The length is set to be sufficiently larger than the outer diameter of the tip of the long bolt rod, and the tip of the long bolt rod loosely inserted into the through hole is screwed to the plate nut.

[Effect]

With the configuration as described above, the plate-shaped nut can swing and vibrate freely in the recessed part of the inner surface of the base of the anchor body after driving, integrally with the long bolt rod, and the vibration is transmitted from the long bolt rod. This prevents the vibrations and vibrations from being transmitted to the anchor body.

〔Example〕

Hereinafter, embodiments will be explained in detail based on the drawings.

1 and 2 illustrate an example of an anchor according to the present invention, and show the anchor in use. In the same figure, 1
is the wall to be driven into, such as the ceiling wall of the ALC, and the anchor of this invention is driven into the four plate leg pieces 2...
The anchor body 3 has an anchor body 3, a square plate-shaped nut 6 that is loosely inserted into the inner recess 5 of the base 4 of the anchor body 3, and a long bolt rod 7.

A circular through hole 8 is formed in the base 4 of the anchor body 3, and the tip 9 of the long bolt rod 7 is
The tip portion 9 is inserted into the through hole 8 of the base 4 of the anchor body 3 from below in a loose fit manner, and the inside diameter of the through hole 8 is set to be considerably larger than the outside diameter of the long bolt rod 7. is a plate-shaped nut 6 in the recessed part 5
It is screwed into the screw hole.

Further, in FIG. 1, numeral 10 indicates a hanging body such as a ceiling decorative panel. 11 is a washer, and 12 is a nut. A threaded bolt (full thread) is used as the long bolt rod 7, and the washer 11 is externally fitted to the lower end (base end), and the hanging body 10 is attached to the nut 12. It's stuck.

Due to vibrations of the building, etc., the suspended body 10 swings as shown by arrows A and B. However, the outer diameter of the plate-shaped nut 6 made of a square plate piece is set to be sufficiently smaller than the inner dimension of the recessed part 5, so that it can swing freely, for example, in the direction of arrow A, as shown in FIG. Therefore, it can be seen that the anchor body 3 in the driven state is completely stationary and this rocking (vibration) is not transmitted.

By the way, the state before driving into the wall to be driven 1 is as follows.
It consists of the components as shown in FIG.

As shown in FIG. 7, in order to form the anchor body 3, the center portions of a pair of flat strips having a through hole 8 in the center are crossed and overlapped in a cross shape, and the center portions are formed into a U-shape. Just fold it. As a result, as shown in FIGS. 5 and 6, four plate leg pieces 2... which form a rectangular tube shape that opens toward the distal end are formed, and the base ends of these four plate leg pieces 2... A plate nut 6 is loosely fitted into the inner recess 5 formed at the center of the nut 6 so as to be freely swingable. Therefore, the anchor body 3 shown in FIG.
After that, remove the plate nut 6 and the short bolt 11.
Screw them together to form a unit (see Figure 3).

If the tip of the unitized unit is placed against the wall 1 of the ALC as shown in Fig. 8 and driven in with a hammer as shown by arrow F, the short bolt 1 will be removed.
1, the plate leg pieces 2 are driven in and spread apart as shown in FIG. 4, and finally reach the state shown in FIG.
It rushes in until it comes close to or comes into contact with and then stops. Thereafter, the short bolt 11 and washer 12 used for driving are removed, and the tip 9 of the long bolt rod 7 is threaded instead.

〔effect〕

Due to the above-described configuration, the present invention achieves significant effects as described below.

Even if the long bolt rod 7 screwed into the plate nut 6 swings or vibrates due to external force after driving the anchor into the wall 1 to be driven such as ALC,
The rocking/vibration is transmitted to the four plate leg pieces 2 by the play between the through hole 8 and the long bolt rod 7, and the play between the inner recess 5 and the plate nut 6. be prevented from being Therefore, the anchor does not pull out from the wall 1 to be driven, and a strong initial pulling force can be maintained for a long time.

Since the four plate leg pieces 2 are driven into the wall 1 to be driven in a cross shape, it has a strong pulling force. Moreover, since the plate leg pieces 2 are flat, the legs can be easily opened, and there is little resistance when driving the anchor, making it easy to drive the anchor.

The anchor main body 3 having four plate leg pieces 2 has a simple structure and can be easily manufactured by simply crisscrossing and overlapping a pair of strips 13, 13 and bending them into a U-shape.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional front view showing an embodiment of the present invention in a state of use, Fig. 2 is a cross-sectional front view of main parts for explaining the operation, Fig. 3 is a perspective view of the state before driving, and Fig. 4 is a An explanatory diagram immediately after driving, Fig. 5 is an exploded front view, and Fig. 6 is an explanatory diagram immediately after driving.
The figure is an exploded perspective view, Figure 7 is a manufacturing method explanatory diagram, and Figure 8 is an exploded perspective view.
This figure and FIG. 9 are explanatory diagrams of driving. DESCRIPTION OF SYMBOLS 1...Wall to be driven, 2...Plate leg piece, 3...Anchor body, 4...Base, 5...Inner recess, 6...
Plate nut, 7...Long bolt rod, 8...Through hole,
9...Tip.

Claims (1)

[Claims for Utility Model Registration] A pair of flat strips 13 having a through hole 8 in the center,
While crossing and polymerizing the central part of 13 in a cross,
The central portion is bent into a U-shape to form four square tube-shaped plate leg pieces 2 that open toward the tip side, and the base ends of these four plate leg pieces 2... and the above-mentioned plate leg pieces 2 are formed. A plate-shaped nut 6 is fitted loosely into the inner recess 5 formed at the center, and the inner diameter of the through-hole 8 is set to the diameter of the tip 9 of the long bolt rod 7. An anchor characterized in that the tip part 9 of the long bolt rod 7, which is set to a size sufficiently larger than the outer diameter and loosely inserted into the through hole 8, is screwed onto the plate nut 6.